| Study of Lightning and Lightning Protection (Selected Pages) |
18 FEB 88 |
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| Authors:
I. S. Stekol'nikov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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 | This Russian translations deals primarily with ball lightning including laboratory methods for making ball lightning. Brief sections discuss luminous clouds and 'Black' lightning. A table of contents for the entire book is also included. ANNOTATION: Study of Lightning and Lightning Protection (Selected Pages)-- Translation. |
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| Acta Aeronautica et Astronautica Sinica (Selected Articles) |
18 FEB 88 |
36 pages |
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
 | This paper demonstrates the importance of stealth penetration ability for future military aircrafts via three areas such as the inspirations from war, the conclusions of a system engineering analysis and the threats from anti- stealth techniques, etc. The emphasis of this paper is placed on the analysis of the new content of tactical-technical requirements for military aircrafts in the early part of the 21st century---the three categories included in the ... |
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| ACTA Aeronautica et Astronautica Sinica (Selected Articles) |
18 FEB 88 |
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| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| The first paper demonstrates the importance of stealth penetration ability for future military aircrafts via three areas such as the inspirations from war, the conclusions of a system engineering analysis and the threats from anti-stealth techniques, etc. The emphasis of this paper is placed on the analysis of the new content of tactical-technical requirements for military aircrafts in the early part of the 21st century---the three categories included in the ... |
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| Method of Manufacturing Polyamide, Polyurethane and Similar Threads, Fibers, Tapes and other Articles and Device for Carrying out This Method |
10 FEB 88 |
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| Authors:
Wolfgang Kuentscher; Hans Kilver; Vladimir Davydov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| This invention is a method of manufacturing polyamide, polyurethane, and similar threads, fibers, tapes, and other articles by molding them from a polymer melt. THe advantage of the proposed method over the known one is that the threads, fibers, tapes and similar articles obtained from polyamides, polyurethanes and similar substances are of higher quality, specifically, with regard to their strength and elongation. This is accomplished by using an electromagnetic field ... |
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| Device for Winding Hollow Plastic Articles |
09 FEB 88 |
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| Authors:
F. P. Org; G. G. Pil'var; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| We know of a device for winding hollow plastic articles which contains a mechanism for continuously feeding the plastic blank, e.g., a bar or strip; a rotating mandrel which has the same configuration as the finished article; a mobile carriage driven by a lead screw to impart translational movement to the mandrel relative to the blank feed mechanism; and a common synchronous electric drive for turning mandrel ans the lead ... |
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| Method of Hardening Glass-Reinforced Plastics |
09 FEB 88 |
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| Authors:
V. F. Dolgikh; S. L. Roginskiy; E. L. Kushnikova; L. A. Luchino; Sh. K. Ashratova; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| This invention is a method of hot hardening glass-reinforced plastics with any dimensions and for any purpose. We know of a method of hot hardening glass-reinforced plastics in which a metal grid or wire to which current is subsequently supplied is inserted inside the glass-reinforced packet. The heat from the heated wire causes the binder to harden. However, the introduction of a metal grid or wire, which is a foreign ... |
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| Determining the Local Coefficients of Heat Emission of a Disk Which is Rotating in a Housing with Jet Blowing off with Air |
29 JAN 88 |
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| Authors:
A. L. Kuznetsov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| The article sets forth the results of tests for determining the local coefficients of heat emission of a rotating disk in the case of jet blowing off with air. ANNOTATION: Determining the Local Coefficients of Heat Emission of a Disk Which is Rotating in a Housing with Jet Blowing off with Air--Translation. |
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| Corrosion and Electrochemical Behavior of Binary Magnesium Alloys |
26 JAN 88 |
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| Authors:
I. Yu. Mukhina; M. A. Timonova; M. B. Al'tman; T. I. Yershova; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| A systematic investigation of the effect of 23 elements on the corrosion behavior of magnesium alloys in a 3% solution of Sodium Chloride (NaCl) and in a humid atmosphere was carried out. The values of the stationary potentials and the variation of the potentials through times are determined. The purpose of this work is to make a systematic investigation of the effect of alloying additives on the corrosion resistance and ... |
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| Experimental Determination of the Coefficients of the Hydraulic Resistance of Apertures in the Rotary Disks |
22 JAN 88 |
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| Authors:
I. T. Shvets; Ye. P. Dyban; G. F. Selyavin; M. V. Stradomskiy; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| Conclusion/derivations. 1. Rotation of disk exerts a substantial influence on condition of course of air through apertures. In the large ratios of the velocity of the rotation of the mean flow rate in the opening/aperture (order u/c=2.5) the value of the coefficient of flow rate for the openings/ apertures with the sharp entering edges decreases approximately 6 times. 2. With sufficient high u/c (more than 4) effect of form of ... |
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| High-Molecular Compounds (Selected Articles) |
07 JAN 88 |
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| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| The polymerization of methyl methacrylate (MMA) in the presence of nitroalkanes is accompanied by a decrease in spin-lattice relaxation time even in the absence of a monomer-to-polymer transformation, which is evidently linked to the participation of free radicals in the process. With the objective of elucidating the nature of these free radicals and developing some estimate of their concentration, we undertook to investigate the polymerization of MMA in the presence ... |
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| Nuclear Power Plants |
18 DEC 87 |
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| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| China's energy resources are unequally divided. Most of the coal reserves are in the north and most of the water power resources are in the western part of the country. It is imperative that nuclear power be developed in the energy-poor region of the east, the south and the northeast where industry and population is rather concentrated. Should the north's coal be transported to the south? The amount to transport ... |
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| Control of Laminar Flow Around of the Wing in Free-Air Conditions |
04 DEC 87 |
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| Authors:
V. B. Zozulya; O. R. Cheranovskiy; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
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| Method of Obtaining a Heat-Stable Binder Based on Aromatic Dimaleimides |
03 DEC 87 |
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| Authors:
M. V. Barkova; L. V. Lebedeva; L. K. Afinogenova; A. D. Bol'shakova; A. A. Golubkova; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| This invention is a method of obtaining a heat stable binder based on aromatic dimaleimides which is different because in order to improve wettability and increase adhesion, reduce the solidification temperature and increase adhesion, reduce the solidification temperature and increase the solidification rate, aromatic dimaleimides (e.g., ortho-, para- and metaphenylenedimaleimides) are copolymerized with furyl alcohol. This invention is in the field of the development of heat stable binders, especially new ... |
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| Review of Soviet Inventions |
18 NOV 87 |
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| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| One of the most interesting and recent inventive designs is the MTM- 300 multishuttle weaving machine. The USSR has produced a 1200 megawatt turbine generator. No other country in the world possesses such large units. The turbine generator is to be installed in the Kostroma Power Plant. As many as 17 inventions and many proposals for improvements were involved in the development of its design. ANNOTATION: Review of Soviet Inventions--Translations. ... |
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| Method of Obtaining the Modified Cellulose Materials |
18 NOV 87 |
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| Authors:
I. N. Ermolenko; R. N. Sviridov; V. A. Popov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| Described is an invention for obtaining the modified cellulose materials by introduction into the cellulose by means of its oxidation of carboxyl groups with the subsequent substitution of these groups by metal ions. For obtaining fibrous materials with high thermal stability and electrical conductivity is proposed salt of oxidized cellulose, which contains metal ions, to be subjected to heat treatment in vacuum or inert medium. ANNOTATION: Method of Obtaining the ... |
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| Influence of Complexing on the Reactivity of Polar Unsaturated Monomers |
18 NOV 87 |
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| Authors:
B. L. Yerusalimskiy; V. N. Krasulina; Yu. Ye. Eyzner; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| The known data about the behavior of vinyl monomers (M) during anionic polymerization conform to the following order of activity: nitroethylene > acrylonitrile (AN) > methylacrylate (MA) > methyl methacrylate. At the same time the calculations of distribution of electron energy, made by us according to the method of zero differential overlapping, lead to another order, as this show pi components of charge of beta carbon atom of vinyl group ... |
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| High-Molecular Compounds (Selected Articles) |
17 NOV 87 |
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| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| Studies has recently appeared in the literature concerning the synthesis of poly-2,6-benzothiazoles (PBT) at high temperatures in a solvent. Aromatic PBT exhibit exceptionally good resistance to heat and chemicals but cannot be dissolved in any of the organic solvents. The object of the present study was to synthesis PBT in two stages, attempting in the first stage to obtain noncyclized polymers which would be soluble in organic solvents and to ... |
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| Method of Obtaining Polymeric Materials |
04 NOV 87 |
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| Authors:
V. A. Berestnev; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| Are known two methods of orienting macromolecules, accomplished by stretching of the heated polymer above temperature of vitrification or the treatment of polymer by special catalysts or by modifiers. In the proposed method of obtaining polymeric materials the orientation of macromolecules is accomplished by the effect of electric or magnetic field, which makes it possible to improve the quality of the obtained polymeric materials and to decrease expenditures. Method consists ... |
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| The Mechanism of Stereo Regulation during Anionic Polymerization of Polar Monomers |
30 OCT 87 |
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| Authors:
V. N. Krasulina; A. S. Khachaturov; N. V. Mikhaylova; B. L. Yerusalimskiy; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| Formulation of the problem of the relative role of specific factors, which are basically capable of causing the corresponding effects, is justified in connection with the essential relationship of the micro structure of polymers, which are formed due to the action of anionic initiators, to the nature of the reaction medium. One of them is the change of overall polarity of the medium during the transition from one solvent to ... |
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| Spherulite Similar Structures in Amorphous Polymers |
30 OCT 87 |
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| Authors:
L. B. Peyeva; M. A. Natov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| On the basis of a number of direct and indirect experimental results, old concepts were examined and a new concept of the structure of a amorphous polymers was developed. According to this concept, amorphous polymers are well ordered systems, which in the glass like, highly elastic and viscous states can be constructed of individual macromolecules in the form of globules or from convoluted macromolecules, which are assembled in fibrillar formations, ... |
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| High-Molecular Compounds (Selected Articles) |
30 OCT 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Earlier it was shown that 33% emulsions of copolymers of methylmethacrylic (MA) with methylacrylic (MA) with the addition of acetophenone and other organic liquids in the amount of 10-40% acquire the property of sharply pronounced thixotropy, which is characterized by the reduction of viscosity by 5 orders in a narrow interval of stresses. Interpretation of this phenomenon is deserving of attention. In particular, it is interesting to discover whether it ... |
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| High-Molecular Compounds (Selected Articles) |
26 OCT 87 |
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| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Information on the polymerization of vinyl benzoate (VB) contained in a number of published studies is rather contradictory in its experimental results and their explanations. For example, it is contradictory on the question of the formation of cross linked or linear structures of block polymers, as well as on the half or primary order of reaction rate on concentration of the initiator. The works demonstrated the possibility of polymerization of ... |
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| High-Molecular Compounds (Selected Articles) |
15 OCT 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Earlier we published results of a study of copolymerization of styrene with a number of stained monomers, which were obtained on a base of n- and m-amino styrenes. In this report we present data on copolymerization of methylmethacrylate (MMA) with the same monomer dyes. The content of MK 1 inks in the products of copolymerization were determined, as earlier, by the colorimetric method. As in the case of copolymerization of ... |
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| Theoretical Bases of Polymer Photodegradation and Photooxidation |
15 OCT 87 |
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| Authors:
J. Rabek; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| The photodegradation and photooxidation of polymers are interrelated processes which occur simultaneously during the photoaging of polymers in the air. Only under laboratory conditions can one distinguish photodegradation from photooxidation by conducting reactions in an oxygen-free atmosphere. Polymers synthesized on an industrial scale are contaminated with various low-molecular compounds derived from the technological process (initiators, inhibitors, moderators, solvents, etc.). In addition, when such processes are carried out in an atmosphere ... |
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| High-Molecular Compounds (Selected Articles) |
14 OCT 87 |
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| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| It was shown in work that the properties of isotactic high molecular weight polymethylmethacrylate PMMA differ from the properties of isotactic low molecular weight PMMA and we hypothesized that there are stereo complexes in a solution of PMMA with a content of 70% isotactic stereo isomer. Intending to study the state of high molecular weight isotactic PMMA in dilute solutions we studied in the influence of temperature on their light ... |
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| High-Molecular Compounds (Selected Articles) |
09 OCT 87 |
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| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Electric and magnetic properties of oligomers of type HC=C-Ar-C=CnH depend on structure of arylene part of Ar - basic link of oligomer. The introduction of the aliphatic chain between the aromatic nuclei in the arylene part interrupts conjugation, and oligomer acquires dielectric properties. In this case their solubility plays especially large role, since the possibility of obtaining of them the films is determined. Therefore for increasing the solubility and for ... |
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| Selection of Polymer Materials for Manufacturing Optical Parts |
06 OCT 87 |
|
| Authors:
D. Ye. Kurshinska; G. E. Kudlya; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| Since from heat-reactive materials lens can be prepared mechanically (prolonged and cumbersome process) or with polymerization in the form then were selected plastic materials and most productive and cheapest method of treatment/ processing thermoplasts - press casting. For preparing lens by press casting one should use large injection pressure. Based on this, for the experiments the casting machine (WH-63) with the piston plastification of material and the maximum pressure was ... |
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| High-Molecular Compounds (Selected Articles) |
01 OCT 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Stretching as a method of physical modification of the properties of polymers basic on the creation of primary orientation of the macromolecules in polymer material is a widely used technique, but the phenomena which take place during the orientation, particularly the processes of restructing the supermolecular structure, especially in amorphous polymers have remained outside the field of view of researchers. In only one of the works of Zhurkov and his ... |
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| An Evaluation of Effectiveness of PTFE (Polytetrafluoroethylene) Type Friction Reducers on Reducing Friction and Wear |
25 SEP 87 |
|
| Authors:
Yiming Guo; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Friction reducer containing colloidal polytetrafluoroethylene (PTFE) is one of the new lubricating materials recently developed abroad for automobile engines. This paper mainly reports: (1) the effectiveness of friction reducers (three American products and one Chinese product) on the anti-friction and fuel- saving of Chinese multi-cylinder gasoline engines; and (2) the effectiveness of these friction reducers on the anti-wear of Chinese gasoline engines. The evaluations were conducted in Beijing, Shanghai, and ... |
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| New Breakthrough in Chinese Integrated Circuits - Successful Development of High-Speed CMOS Circuits |
23 SEP 87 |
|
| Authors:
Suifu Wang; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| In the field of high-speed logic circuits, the new bipolar type integrated circuits have held a prominent position for some time now. Unfortunately, a fatal flaw of the bipolar type circuit is that power dissipation is high and, consequently, they are greatly limited in application. Since CMOS circuits have the distinctive advantages of low power dissipation and good anti-interference properties they are looked upon with favor. The shortcoming of the ... |
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| The Mechanism of Electrical Erosion of Metals |
23 SEP 87 |
|
| Authors:
S. L. Mandel'shtam; S. M. Rayskiy; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| In certain forms of electrical discharge, in a condensed spark discharge, in particular, as we know, server damage occurs to both electrodes or one of them. This phenomenon, which has been given the name electrical erosion, plays an extremely harmful role in a number of practical applications of the discharge. It results in intense damage to high-voltage switches, relay contacts, sparkplugs of internal combustion engines and other discharge devices. At ... |
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| Acrylates and Methacrylates |
15 SEP 87 |
|
| Authors:
L. A. Morozov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Among monomers utilized in production of polymeric materials, an important place is occupied by acrylic and methacrylic acids and especially their esters. Acrylic and methacrylic monomers can be polymerized and copolymerized with other vinyl monomers by all known methods with the formation of different high-molecular compounds. These polymers and copolymers possess important properties: by significant weather resistance, transparency, resistance to aging, elasticity, water resistance, heat resistance, high mechanical and dielectric ... |
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| Using Binary Mixtures of Vinyl Monomers for Synthesizing Cellulose Graft Copolymers |
11 SEP 87 |
|
| Authors:
G. I. Stanchenko; R. M. Livshits; Z. A. Rogovin; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| The possibility of giving modified cellulose fibers a set of new commercially valuable characteristics can obviously be greatly expanded by grafting from binary mixtures of monomers. Moreover, grafting from a binary mixture of monomers is of considerable scientific interest, especially for explaining the kinetic characteristics of this reaction. It is evident from the data provided that when acrylonitrile (AN) is added to styrene (St), vinyl acetate (VA) and methyl acrylate ... |
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| High-Molecular Compounds (Selected Articles) |
11 SEP 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| In work based on example of polymethyl methacrylate (PMMAIIMMA- polymethyl methacrylate) were given results of experiments on stabilization of polyacrylates during thermo-oxidizing destruction by introduction to polymer chain of thioalkyl-acrylic. Represented interest emission by proposed method of stabilization of polymers, which contain different functional groups, for example amide, carboxyl, hydroxyl. As subject of investigation were taken copolymers fo butylmethacrylate (BMA) with methacrylamide (AMK), methacrylic acid (MAK) and ethylene-glycolmethacrylate (MEG), copolymer ... |
|
| National Standard Catalog (Selected Pages) |
11 SEP 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| This Chinese translation provides a listing, arranged in numerical order, of the titles of Chinese standards in: Nuclear energy technology, Chemical engineering, Metallurgy, Machinery, Electrical engineering, Electronic computer technology, and Broadcasting communications, Draft, revision, and implementation dates are included. ANNOTATION: National Standard Catalog (Selected Pages)--Translation. |
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| Investigation of the Phase Equilibrium of Alloys of the Ternary System Ti-Al-Nb |
09 SEP 87 |
|
| Authors:
T. T. Nartova; G. G. Sopochkin; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| We limited our investigation of the constitution diagram of the ternary system Titanium Aluminum Niobium to the specific system Ti-Ti3A1-Nb in order to establish the regions of the alpha and beta solid solutions of titanium, the solid solutions based on aluminide Ti3A1 and the phases conjugated with them. The constitution diagram of the systems Ti-A1 and Ti-Nb obtained from the data were used as the basis for constructing the constitution ... |
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| Photo-Destruction of Polymethyl Methacrylate in Solutions |
08 SEP 87 |
|
| Authors:
N. S. Kardash; V. A. Krongauz; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| During study of mechanism of photo-destruction of polymethyl methacrylate (PMMA) significant difficulty consists in the fact that PMMA absorbs in distant ultraviolet region, and in region of wavelengths >254 nm, emitted by light sources usually utilized in photochemistry, its absorption is actually conditioned on presence of admixtures/impurities of undetermined character. Therefore during irradiation of solid samples of PMMA it remains unclear, what groups or molecules initially absorb light and are ... |
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| High-Molecular Compounds (Selected Articles) |
04 SEP 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| With radical polymerization in homogenous liquid phase at early stages of transformation lifetime of active centers is usually 1-5 s. We discovered, that during the polymerization of methylmethacrylate (MMA) in the presence of orthophosphoric acid at usual temperatures appear the long-lived radicals, which lead process actually by the mechanism of living chains , moreover system remains quasi-homogeneous. During investigation of photo- initiated polymerization in systems MMA - H3PO4 composition of ... |
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| High-Molecular Compounds (Selected Articles) |
04 SEP 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| During the study of anionic polymerization of methylmethacrylate (MMA) in solution of toluene on p-C4H9Li in presence of syndiotactic polymethylmethcrylate (PMMA -polymethyl methacrylate) we discovered new stereochemical effects. As is known, with anionic polymerization of MMA in solution of toluene is formed isotactic PMMA of following configuration composition: I=76, H=15, S=9%. The additions of the preliminarily obtained isotactic samples of PMMA do not have an effect on the structure of ... |
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| High-Molecular Compounds (Selected Articles) |
03 SEP 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Polyphenylmethacrylate (PFMA) is very convenient object for studying effect of adjacent links in reaction of hydrolysis of ethers/esters of polymethacrylic acid. Since reactivity of polymethacrylates depends on their micro-tact, during the kinetic investigations of hydrolysis it is desirable to study polymeric samples with different micro-tact. In this work by the method NMR was studied the micro-tact of the samples PFMA, synthesized by different methods. (Russian Translations). ANNOTATION: High-Molecular Compounds (Selected ... |
|
| Acta Aerodynamica Sinica (Selected Articles) |
02 SEP 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Partial contents: Semi-numerical method to treat the three- dimensional stokes flow; A new technique of numerical conformal mapping and its applications; Numerical solution of transonic small disturbance pressure equations using a mixed difference method; Incompressible theory of the interaction between moving bodies and vorticity field - The generation of vorticity by body surfaces and its dissipation; A strong inviscid-viscous interaction solution of a plane transonic cascade flow; Numerical calculations of ... |
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| High-Molecular Compounds (Selected Articles) |
01 SEP 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| We know that salts of metals with variable valency ordinarily inhibit radical polymerization. However, when salts such as LiC1, MgC12, Znc12 and A1C13 are present, the polymerization rate of vinyl monomers with functional groups that form coordinated complexes with salt cations rises. The acceleration mechanism remains unknown. The purpose of this work is to study the mechanism of polymerization in the presence of inorganic complexing agents using the polymerization of ... |
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| Potential Barriers and Internal Rotation in Polyvinyl Acetate and Poly- o-Fluorostyrene |
31 AUG 87 |
|
| Authors:
Yu. Ya. Gotlib; A. A. Darinskiy; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| The present work is devoted to presenting the results of a calculation of potential barriers of internal rotation in the side pendant of some polymers, namely polyvinyl acetate (PVAc) and poly-o-fluorostyrene (POFS), connected namely with the steric repulsion of atoms of the side radicals and the main chain. Furthermore, for POFS it is possible to estimate the contribution of the magnitude of the potential barrier due to the interaction of ... |
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| Investigation of the Rotation of Molecular Groups in Polymers of Methyl Acrylate and Vinyl Acetate by the Method of IR-Spectroscopy |
27 AUG 87 |
|
| Authors:
O. N. Trapeznikova; T. V. Belopol'skaya; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Absorption spectra are given for polymethyl acrylate and polyvinyl acetate in the areas of C-O stretching vibrations, measured at 77 and 295 K. In the range of frequencies of 1100-1300/cm a wide intensive band of absorption is found, the contour of which changes with temperature. Following the separation of this band into components (there turned out to be six) and comparing the behavior of the individual components when the temperature ... |
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| Method of Obtaining of Fire Resistant Polyacrylonitrile Fiber or Cloth from It |
26 AUG 87 |
|
| Authors:
V. Ye. Kotina; A. A. Konkin; R. M. Kosova; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Is known the method of obtaining the fire resistant polyacrylonitrile fiber by heating to 200 C; however, in this case fiber with the low strength characteristics is obtained. Is proposed the method of obtaining of fire resistant polyacrylonitrile fiber or cloth from it, according to which polyacrylonitrile fiber is subjected to in stages hot working, heating initially at 200 C during 25-30 h. They further raise temperature to 200 C ... |
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| Analysis of the Decomposition of Transparent Polymer Materials (Blocks) under the Action of Laser Beams in Free Generation Mode |
26 AUG 87 |
|
| Authors:
M. A. Sultanov; B. N. Narzullayev; V. Urunov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| In the literature was investigated mechanism of decomposition of transparent blocks depending on power of generation, on number of pulses/ momenta, on focal length of lens and so forth on ruby and neodymium lasers both in regime/conditions of free generation and in regime/conditions of giant pulse/ momentum. However, the mechanism of the decomposition of the materials indicated under the action of laser beams by the different authors is explained differently. ... |
|
| Polyvinyl Esters of Omega-H-Perfluoroacids and Polyvinyl Alcohol Obtained from Them |
24 AUG 87 |
|
| Authors:
Ye. N. Rostovskiy; L. D. Budovskaya; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| By means of radical polymerization at 20 we obtained polyvinyl esters of omega-H-perfluoroacids from monomers. The product of their saponification - polyvinyl alcohol (PVA) - differs significantly from PVA which is obtained by other methods (mainly with respect to its exceptionally high water resistance). It contains 0-0.25% glycol groups (based on oxidation of periodic acid). When heated higher than the glass transition temperature Tc = 90 it is crystallized rapidly, ... |
|
| High-Molecular Compounds (Selected Articles) |
24 AUG 87 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Contents: Methacrylic Polymers with a Syndiotactic Structure on a Base of Esters of Phosphorus-Containing Alcohols, Permanent Dipole Moment in Associations of Polymethacrylic Acid and Polyvinyl Alcohol, Investigation of the Kinetics of Polymerization of Compounds When and Acid Chloride of Carboxylic Acid-Tertiary Amine System is Present. ANNOTATION: Reprint: High-Molecular Compounds (Selected Articles). |
|
| Efficiency Analysis of Airborne Electronic Countermeasures (ECM) systems |
21 AUG 87 |
|
| Authors:
Yiting Zhang; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Along with the development of electronic countermeasures, the evaluation of the efficiency of airborne electronic countermeasure systems has become a question to which people have paid greater and greater attention. This article initially makes an analysis of the importance of the evaluation of efficiency and then proceeds to carry out an analysis and calculations making use of methods from operations research. It also makes use of methods relating to queueing ... |
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| Modification of the Structure of Amorphous Directional Polymethyl Methacrylate by Methods of Grafted and Block Polymerization |
14 AUG 87 |
|
| Authors:
A. I. Kurilenko; V. P. Yakimtsov; L. P. Krul'; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| In this work processes of grafted and block polymerization of polyacrylonitrile (PAN) and polyvinylidene chloride (PVDKh) in amorphous films of atactic polymethyl methacrylate (PMMA), oriented by extract, are studied. The selected polymers possess the combination of the properties, necessary for checking the assumptions presented. Oriented PMMA has heterogenic fibrillar structure (as crystalline materials) and is readily soluble in AN and VDKh. PVDKh in the process grafting is crystallized and it ... |
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Reports by Corporate Author
