| Molecular Design of Novel Poly(urethane-urea) Hybrids as Helmet Pads for Ballistic and Blast Trauma Mitigation |
Mar-2009 |
22 pages |
| Authors:
Alex J Hsieh; Joshua A Orlicki; Rick L Beyer; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
 | Polyurethane (PU) and poly(urethane urea) (PUU) based foams are currently being used as helmet pad materials. The U.S. Army still has a critical need for more efficient foam pad materials and designs that will provide warfighters with improved survivability against blast-induced traumatic brain injuries. Recent work has shown that tailoring the microphase-separated morphology is critical in controlling the high strain-rate mechanical deformation of bulk PU and PUU elastomers. In this ... |
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| Development of an Enhanced Durability Corrosion Protecting Self-Priming Topcoat |
15 JUL 2004 |
7 pages |
| Authors:
Joseph H. Osborne; BOEING PHANTOM WORKS SEATTLE WA
|
| Monthly report of progress in developing an enhanced self priming topcoat using high performance urethane resins and advanced concepts in nonchromate corrosion protection. The goal of the program is to develop a coating that meets and exceeds the requirements of TT-P-2756 and exceeds the performance of the existing topcoat material qualified to the specification. |
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| Replacement Alternatives to the Chromate Wash Primer DOD-P-15328D |
JUN 2004 |
26 pages |
| Authors:
Pauline Smith; Kestutis Chesonis; Christopher Miller; John Escarsega; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The major advantage of the Department of Defense (DOD)-P-15328DD1 wash primer is to enhance corrosion resistance through the passivation of the metal surface. In the U.S. Army's Chemical Agent Resistant Coating (CARC) system, the wash primer DOD-P-15328D is overcoated with an epoxy primer and followed by a camouflage urethane topcoat. Several coating procedures specify the use of the wash primer, DOD-P-15328D, as a surface treatment prior to the application of ... |
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| Laboratory Evaluation of Moisture Cure Urethane Coatings |
SEP 2003 |
50 pages |
| Authors:
Alfred D. Beitelman; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
|
| The Corps of Engineers is considering the use of moisture cure urethane paints on navigation and other hydraulic structures. Since it is desirable to specify paints generically, work was initiated to determine the salient properties of commercially available products from four manufacturers. |
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| NAL SST Arrow Wing with Oscillating Flap |
01 OCT 2000 |
|
| Authors:
M. Tamayama; K. Saitoh; H. Matsushita; J. Nakamichi; NATIONAL AEROSPACE LAB TOKYO (JAPAN)
|
 | A wind tunnel model of a SST(Supersonic Transport) arrow wing was tested in transonic regime. The purpose of this experiment is to accumulate verification data for the establishment of aeroelasticity related CFD codes and ACT (Active Control Technology ) in the Japanese SST program. The model is a semi-span arrow wing with a fuselage. The leading edge is double-swept-backed as shown in Fig. 1 and 2. The inboard sections of ... |
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| Guidance Development: Thin Film and Epoxy Mortar Flooring Systems |
AUG 2000 |
65 pages |
| Authors:
C. D. Gaughen; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
|
| The objective of this effort was to develop two floor coatings specifications for use in aircraft maintenance facilities: 1) Thin film flooring system, and 2) Epoxy mortar flooring system. This work was in response to a request from the Airfield Criteria Manager and was funded in part by NFESC's Hangar Floor Coating Program. |
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| Coating Guidance for Naval Facilities |
JUL 2000 |
12 pages |
| Authors:
C. D. Gaughen; Joseph H. Brandon; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
|
| An overview of coating guidance used by the U. S. Navy for facilities is presented. Topics discussed include surface preparation, coating guidance (industrial/architectural specifications), maintenance painting, present coating work, and Navy coating needs. |
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| Copper Crusher Gauge Holder |
23 NOV 1999 |
6 pages |
| Authors:
Eugene W. Bowie; Raymond E. Bowen; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A copper crusher gauge holder for testing internal pressures of cartridges during test firing is provided. The copper crusher gauge holder has a circular aluminum upper plate and a circular aluminum lower plate having a layer of urethane rubber approximately 3/4 inch thick sandwiched between the plates. The gauge holder is bored to hold copper crusher gauges and center-bored to fit over a cartridge centerline primer tube. A series of ... |
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| Mechanical Vibration Testing Results of Acoustic Test Panels |
DEC 1998 |
17 pages |
| Authors:
Colin P. Ratcliffe; Roger M. Crane; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This report describes the mechanical vibration testing of two graphite reinforced composite plates. The plates were tested in a free-free boundary condition up to a frequency of approximately 6 kHz. The plates were designed to assess two different damping treatments. They consisted of a 1.37 inch thick carbon epoxy structural section with a 0.13 in thick region on one side for each treatment. One plate used a conventional constrained layer ... |
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| Non-Skid, Non-Flammable Coating for Navy Applications |
08 NOV 1998 |
28 pages |
| Authors:
Georgette Siparsky; Silvia Luebben; TDA RESEARCH INC WHEAT RIDGE CO
|
| We have prepared a series of hybrid additives and incorporated them into urethane and epoxy coatings that were applied on steel and aluminum substrates. The films were homogeneous, but with a high coefficient of friction. The resulting coating toughness was increased, as measured by the improved abrasion resistance, hardness and flexibility of the coating. Similarly, the oxygen index and smoke density properties of the coating were used to demonstrate improved ... |
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| Elimination of Surface Irregularities on the Wraparound Window of a Torpedo Nose Array |
31 MAR 1998 |
|
| Authors:
Luis E. Lema; Thomas A. Galib; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| The present invention relates to a method for eliminating surface irregularities on the wraparound window of a torpedo nose array. The method broadly comprises the steps of preheating an oven to a temperature in the range of from about room temperature to about 160 deg F, placing the nose array with the surface irregularities in the preheated oven, applying a vacuum at a pressure of up to about 10 mm ... |
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| Beamformed Nearfield Imaging of a Simulated Coronary Artery Containing a Stenosis |
06 OCT 97 |
42 pages |
| Authors:
Andrew J. Hull; Norman L. Owsley; NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI
|
| This report describes a method that detects and localizes an artery containing a partial blockage by exploiting the shear wave field properties of the surrounding solid. An array measurement system is placed on the free surface of a urethane mold that contains a surgical tube. Inside the surgical tube is a nylon blockage that acts as a constriction to the water flowing through the tube. A turbulent field develops in ... |
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| Summary of Fy 97 Work on Multipore Suction Techniques |
OCT 1997 |
11 pages |
| Authors:
John Mittleman; COASTAL SYSTEMS STATION PANAMA CITY FL
|
| Non-adhesive attachment systems are used by abalone, octopus, and other gastropods (shellfish) to attach and move securely over surfaces of virtually any condition or roughness using dozens or hundreds of small suction cups. This effort complements adhesive attachment research by trying to synthesize the abalone system, creating a nonadhesive alternative for attaching equipment to surfaces underwater. The proposed embodiment uses a urethane composite material basically formed as a honeycomb with ... |
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| Optical Processes and Devices using Hydrogen Bonded Polydiacetylenes |
AUG 97 |
27 pages |
| Authors:
Daniel J. Sandman; Jayant Kumar; MASSACHUSETTS UNIV LOWELL CENTER FOR ADVANCED MATERIALS
|
| This report is presented in three parts: Experiments on Presently Known Materials, New Materials, and Materials for Optical Limiting. Each part is separately referenced and has its own figure numbering and captions. This year's work has made significant progress on several topics. Our observation that the surfaces of urethane-substituted polydiacetylenes(PDA) that were polymerized by (60)Co gamma radiation in the presence of air show conical eruptions on the main crystalline face ... |
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| Radiation Curing of Fabric Reinforced Elastomeric Composites |
26 FEB 97 |
104 pages |
| Authors:
Walter J. Chappas; Feng-Jon Chang; Joseph Silverman; MARYLAND UNIV COLLEGE PARK
|
| Ionizing radiation from cobalt-6O gamma and electron beam sources are used to investigate methods to improve the abrasion resistance of polyurethane elastomers. Radiation curing of acrylated urethane oligomers and grafting acrylonitrile onto polyurethanes were studied. Low energy electron beam and plasma surface treatment was also performed. A special device was developed to measure edge abrasion, ie. the abrasion of folded surface. This work demonstrated that radiation grafting techniques are an ... |
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| Organo-Aluminate Polymeric Materials as Advanced Erosion/Corrosion Resistant Thin Film Coatings |
19 DEC 96 |
17 pages |
| Authors:
Ronald L. Cook; Andrew R. Barron; James O. Stoffer; Harian Anderson; TDA RESEARCH INC WHEAT RIDGE CO
|
| To address the need for new environmentally compliant high performance coatings, TDA Research, Inc. (TDA) has proposed the development of a new class of high performance coating materials based on molecular composites known as carboxylato-alumoxanes. These materials consist of a boehmite particle covalent bound within a organic periphery. Functionalization of the organic groups allows incorporation of the boehmite particles into standard coating materials such as epoxies and urethanes. The presence ... |
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| Multi-Section Sonar Array Cable. |
01 OCT 1996 |
|
| Authors:
Wendell C. Maciejewski; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| Sonar array cable is typically provided in lengths comprising hydrophone arrays and associated electronics and transmitter can components, each cable length or section having one of each of these components housed therein. These sections are relatively stiff and unbendable, requiring that they be connected with relatively bendable intermediate segments. These intermediate segments are susceptible to excessive bending that can lead to failure of thc wiring provided therebetween. The wiring in ... |
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| Determination of the Distribution of Polydimethyl Siloxane Segment Lengths at the Surface of Poly(dimethyl siloxane) Segmented Copolymers |
AUG 96 |
23 pages |
| Authors:
Hengzhong Z. Zhuang; Joseph A. Gardella Jr.; David M. Hercules; STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
|
| Time-of-flight secondary ion mass spectra were recorded from submonolayer thin films of aminopropyl end-capped poly(dimethylsiloxane) (PDMS), and from thick films (ca. 50 micrometers) of poly(dimethylsiloxane urethane) (PU-DMS) segmented copolymers. Ions detected and assigned to fragments in the low mass range (m/z where the intact PDMS segment is present; it therefore can be used to evaluate the PDMS segment length distribution at the surface of the copolymer. It was found that ... |
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| Manufacturing Technology for High Voltage Power Supplies (HVPS). Volume III - Procedural Details |
AUG 96 |
300 pages |
| Authors:
NORTHROP GRUMMAN CORP ROLLING MEADOWS IL
|
| This report is the culmination of a multi-year manufacturing technology program sponsored by the Electronics Division of Wright Laboratory Manufacturing Technology Directorate (WL/MTM). The program was jointly conducted by Northrop Grumman Electronics and Integration Division as the prime contractor and Hughes Aircraft Company Technology Support Division as the principal subcontractor. The thrust of this program was to improve the reliability of High Voltage Power Supplies (HVPS). This was accomplished conducting ... |
|
| Proceedings of the International Conference on Phosphorus Sulfur, and Silicon and the Related Elements (13th) Held in Jerusalem, Israel on 16-21 July 1995. Part 1 |
JUN 96 |
662 pages |
| Authors:
Eli Breur; HEBREW UNIV JERUSALEM (ISRAEL) DEPT OF PHARMACEUTICAL CHEMISTRY
|
| Partial contents: Fluorhydroxyapatites of Northern Europe and Their Thermal Transformations; Physical Properties of Calcium Phosphates Glasses with Various CaO/P2O5 Mole Ratios; Calcination of Negev Phosphorites and Possible Causes for Technological Problems; New Aspects of Solid State Transformation of Vanadium Phosphates Used as Catalysts for Selective Oxidation or Ammoxidation Reactions; The Solid-State NMR of P-S and P-Se Compounds - An Important Tool for the Structure Investigation; Qualitative and Quantitative Study of ... |
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| Protective Coating Analysis |
MAY 1996 |
|
| Authors:
Diane L. Sabal; Gregory J. Dohm; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
|
| As a National Center for Energetics, the Indian Head Division, Naval Surface Warfare Center (IHDIV, NSWC) is committed to providing quality products in support of the Fleet. In concert with this effort, the AEPS/PAD Engineering and Production Divisions provide life-cycle support for various Navy Aircrew Escape Propulsion Systems (AEPS) devices used in aircraft. This cradle-to-grave philosophy has led to a strive for technical excellence as well as environmental responsibility. To ... |
|
| Fungal Contamination of H-53 Aircraft |
15 MAR 96 |
32 pages |
| Authors:
Dennis M. Lavoie; Brenda J. Little; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS MICROBIOLOGICALLY INFLUENCED CORR OSION SECTION
|
| Fungal contamination of aircraft interior surfaces has the potential to influence corrosion of airframes, cause acute or chronic health problems in crews, and causes excessive maintenance efforts. Nine genera of microfungi were isolated from H-53 aircraft in various stages of the depot maintenance cycle at Naval Aviation Depot, Cherry Point, NC, in October 1995. The results of this study support previous studies that demonstrated a potential for corrosion of unprotected ... |
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| Electroactive Elastomeric Structures (EAES) for Hydroacoustic Applications |
JAN 96 |
|
| Authors:
Terry D. Gulden; GENERAL ATOMICS SAN DIEGO CA
|
|
| Development of Coatings Performance Specifications for Steel Exposed to the Atmosphere. Aluminum Epoxy Mastic and Epoxy/Urethane Systems |
OCT 95 |
203 pages |
| Authors:
Timothy D. Race; Mark A. Kelly; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| Provisions of the Clean Air Act Amendments of 1990 will restrict the use of high solvent-content paints beginning in 1996. Procurement reform indicates the use of other than military specifications and emphasizes the use of commercial products and performance specifications. In response to procurement reform and air quality regulations, the U.S. Army Corps of Engineers must replace some of its existing coating specifications. This study developed two performance-oriented commercial item ... |
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| Multiple Environment Polydiacetylene Containing Segmented Block Copolymers |
26 JUN 95 |
|
| Authors:
Ken Zemach; Michael F. Rubner; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MATERIALS SCIENCE AND ENGINEERIN G
|
| We show that it is possible to incorporate polymerizable diacetylene groups within both the hard and soft segments of polyurethane/polyester-based segmented copolymers. The resultant microphase separated polymers are comprised of soft and hard segment domains that are both capable of supporting the solid- state polymerization of the diacetylene groups. Cross-polymerization of the diacetylene groups therefore creates polydiacetylene chains within two distinctly different microenvironments, each with its own thermal and mechanical ... |
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| Surface Chemistry of Non-Fouling Coating Polymeric Materials |
20 JUN 95 |
18 pages |
| Authors:
Joseph A. Gardella Jr; STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
|
| Three phases related to the surface chemistry of potential non- fouling coatings are currently being studied. New analytical methods will be developed for determining fundamental surface structure property relationships, especially for critical micro-structural and bonding details in the topmost surface region. Coordinated surface analytical determination of the effects of structure, processing and treatment will be applied to a variety of multicomponent (especially block and graft co- polymers). We are cooperating ... |
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| Space-Time Characteristics of the Turbulent Flow Energy in a Viscoelastic Medium Using Noninvasive Passive Imaging |
06 MAR 95 |
66 pages |
| Authors:
Norman L. Owsley; Mohamed H. Ahmed; Andrew J. Hull; James Kassal; NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI
|
| This report describes the technology required for noninvasive passive imaging of the turbulent flow energy of space-time signals in a viscoelastic medium. The need for such technology emerges from the field of biomedicine, where low cost noninvasive techniques are necessary to accurately diagnose heart disease. A sensor that can detect extremely low energy levels, such as those encountered in a stenosed artery, is investigated. An experiment that consists of a ... |
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| Molecular Interactions at Marine Interfaces |
20 SEP 94 |
17 pages |
| Authors:
Ralph S. Quatrano; NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF BIOLOGY
|
| Approximately 25 scientists from around the world participated in a workshop aimed at discussing molecular interactions at marine interfaces from two perspectives: the chemistry of adhesive polymers and the biology of structures that serve as attachment organs of marine organisms. Detailed presentations of each area was complemented by joint discussions of the two perspectives in order to achieve interaction on the research programs supported by ONR. Adhesion, Biofouling, Adhesive polymers. ... |
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| Quick Doff Hood (Problem Solving for Apparel Manufacturers) |
14 SEP 94 |
101 pages |
| Authors:
Tony Aspland; Madhusudan Nagaraja; CLEMSON APPAREL RESEARCH FACILITY PENDLETON SC
|
| The U.S. Army currently seals its Quick Doff Hoods using a solvent- based liquid adhesive that is hand-painted onto the garment. The liquid adhesive takes several minutes to cure, releases solvent fumes, and produces inconsistent results. After evaluating a large number of commercially available adhesive Clemson Apparel Research located an adhesive (Worthen E-9) that cures instantly, does not release harmful fumes, and can be consistently applied using conventional seam sealing ... |
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| Urethane Copolymer Formulations as Reactive Topical Skin Protectants. Phase 1 |
15 JUL 1994 |
|
| Authors:
William G. Reifenrath; REIFENRATH CONSULTING AND RESEARCH RICHMOND CA
|
| To develop reactive topical skin protectants (RTSP) against chemical warfare agents (CWA), several amines and an oxime were evaluated as reactive components of formulations containing urethane polymers as diffusional barriers for CWA Formulations were applied to a skin simulant (polyester-silastic membrane) mounted diffusion cells and were challenged with diisopropylfluorophosphate (DFP), a nerve agent analog, and n-butyl 2- chloroethylsulfide (NBcS), a vesicant agent analog. Formulations were evaluated for their ability to ... |
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| Nonchromate, Low Density, Waterborne Epoxy Primer, Tri-Service Committee on Corrosion Proceedings |
JUN 94 |
12 pages |
| Authors:
Robert Chiang; Chris Athanasopoulos; SPRAYLAT CORP CHICAGO IL AEROSPACE COATINGS DIV
|
| A chrome-free, low density, waterborne epoxy primer was developed to meet MIL-P-85582B Specification. This primer does not contain toxic pigments and provides comparable corrosion protection as strontium chromate counterparts. Its dry film density was calculated at 0.0073 lbs/mil/square ft. It can be top coated with MIL-C-83286 and MIL-C-85285 urethane coatings within an hour at 77 deg F and 50% RH. |
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| Self Assembled Spin Coated and Bulk Films of a Novel Polydiacetylene as Second Order NLO Polymers |
31 MAY 94 |
32 pages |
| Authors:
W. H. Kim; B. Bihari; R. Moody; N. B. Kodali; J. Kumar; MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY
|
| The polymer chains of a novel asymmetric polydiacetylene, namely poly((8-butoxy carbonyl) methyl urethanyl) 1-(5-pyrimidyl)-octa-1,3-diyneD), in the absence of nonlinear optically active chromophores and without recourse to poling assemble in an acentric stable polar organization upon spin coating or solution casting. Asymmetry of the side groups and the spontaneous alignment of the urethane side groups by means of hydrogen bonds appear to be responsible for this organization. An abrupt decrease of ... |
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| Self Assembled Spin Coated and Bulk Films of a Novel Polydiacetylene as Second Order NLO Polymers |
31 MAY 94 |
32 pages |
| Authors:
W. H. Kim; B. Bihari; R. Moody; N. B. Kodali; J. Kumar; MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY
|
| The polymer chains of a novel asymmetric polydiacetylene, namely poly((8-butoxy carbony)methyl urethanyl) 1-(5-pyrimidyl)-octa-1,3-diyne)(BPOD), in the absence of nonlinear optically active chromophores and without recourse to poling assemble in an acentric stable polar organization upon spin coating or solution casting. Asymmetry of the side groups and the spontaneous alignment of the urethane side groups by means of hydrogen bonds appear to be responsible for this organization. An abrupt decrease of SH ... |
|
| Specific Interactions in Polyurethane Cationomers |
94 |
189 pages |
| Authors:
Richard J. Goddard; AIR FORCE RESEARCH LAB BOLLING AFB DC
|
| Studies have shown that addition of cationic groups to a segmented polyurethane can dramatically change physical attributes such as solution behavior, mechanical strength, and viscoelastic properties. However, the specific interactions responsible for these changes are not well understood. A series of polyether polyurethane cationomers were synthesized using chain extenders with pendant trialkylammonium groups. The morphology and properties of the cationomers were studied as a function of ion-related variables using small- ... |
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| Object Imaging Accomplished with an Integrated Circuit Robotic Tactile Sensor Incorporating a Piezoelectric Polyvinylidene Fluoride Thin Film |
DEC 93 |
259 pages |
| Authors:
John M. Emmert; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| The purpose of this research effort was to investigate the performance of a piezoelectric tactile sensor design and appropriately refine it. The sensor was fabricated from an 8 x 8 electrode array MOS integrated circuit. Each taxel in the array was 400 microns x 400 microns. A 6 mm x 6 mm piece of piezoelectric polyvinylidene fluoride was adhered to the electrode array using a urethane dielectric adhesive to form ... |
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| Strain Relief for Flexible Wire at Fixed Junction. |
22 NOV 1993 |
|
| Authors:
Wendell C. Maciejewski; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| In a towed array breakout of the type deployed from or retrieved by naval vessels a junction is defined between a fixed portion of an electrically conductive wire and a movable portion of the wire portion. A relatively hard potting material is provided around and defines the fixed portion of the wire. A coiled helically shaped portion of the same wire or a second wire is integrally joined to the ... |
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| Method for Bonding a Polyurethane Molding Composition to a Cable Jacket of and OLEFIN/ESTER Interpolymer. |
26 OCT 1993 |
|
| Authors:
Thomas S. Ramotowski; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A room temperature curing polyurethane composition is bonded to the surface of cables having jackets of an olefin/ester interpolymer to provide a water resistant seal there-about by first exposing the surface of a length of cable to an alkali metal hydroxide solution to hydrolyze the functional ester groups and thereby substitute hydroxyl groups for the organic acid of the ester in the interpolymer at the surface of the jacket. A ... |
|
| GAP Analyses: NMR Methods |
SEP 93 |
16 pages |
| Authors:
R. A. Nissan; M. L. Chan; D. A. Ciaramitaro; D. J. Harris; A. J. Freyer; NAVAL AIR WARFARE CENTER WEAPONS DIV CHINA LAKE CA
|
| Glycidyl azide polymer (GAP) is under investigation as an energetic binder for several military applications. Hydroxy terminated GAP, where two, three, or four end groups per molecule are present has been studied for use in urethane cured formulations. A key to understanding the cure behavior in these systems is an accurate measure of hydroxy equivalent weight. NMR investigations of equivalent weights have been undertaken in our laboratory and we will ... |
|
| Hydrophone Assembly with Vibrations Isolated Transducer Elements. |
31 AUG 1993 |
|
| Authors:
Patrick Monahan; George Battista; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| Hydrophone transducer elements are mechanically isolated from one another in vibration by suspending them in a urethane matrix molded into a cylindrical shape. A metal ring is mechanically locked in an annular slot defined by the cylindrical shaped matrix. The ring is used to mechanically support the assembly for towing. The transducer elements are electrically connected to one another and to an electrical cable independently of this mechanical support. |
|
| Reversal of Saxitoxin (STX) and Tetrodotoxin (TTX) Induced Cardio-Respiratory Failure with 4-Aminopyridine (4-AP). |
13 MAY 1993 |
|
| Authors:
F. C. Chang; R. M. Bauer; B. J. Benton; E. L. Moore; ARMY MEDICAL RESEARCH INST OF CHEMICAL DEFENSE ABERDEEN PROVING GROUND MD
|
| Reversal of STX and TTX induced cardio-respiratory failure with 4-AP was studied in urethane-anesthetized guinea pigs instrumented for the recordings of medullary respiratory activities, diaphragm EMG, ECoG, ECG, blood pressure, end-tidal CO(2), and arterial O(2)/CO2/pH. The toxin (STX or TTX) was infused at a dose rate of 0.3 ug/kg/min (i.v.) to produce a state of cardio-respiratory depression. Animals were maintained with artificial ventilation when the magnitude of diaphragm activity was ... |
|
| Chemical Hazards Associated with the Handling of Urethanes: A Literature Search |
15 APR 93 |
23 pages |
| Authors:
William W. McGee; TEXAS RESEARCH INST INC AUSTIN
|
| This report presents the findings of a literature search documenting the hazardous materials to which workers may be exposed when handling hot, burning, or abraded polyurethanes. The topic hazardous materials is divided into two areas: (1) Chemical hazards identified in the work atmosphere and traceable to starting materials used in the manufacture of urethanes. An extensive list of chemicals associated with the manufacture of urethanes SUCH MATERIALS AS THE PREPOLYMER ... |
|
| Symposium on Inorganic and Organometallic Polymers Held in Denver, Colorado on March 29 - April 2, 1993 |
02 APR 93 |
12 pages |
| Authors:
Patty Wisian-Neilson; SOUTHERN ILLINOIS UNIV AT CARBONDALE DEPT OF CHEMISTRY AND BIOCHEMISTRY
|
| Partial contents: Anionic Polymerization of Masked Disilenes to Polysilylenes, Mechanism and Applications; Electrochemical Access to Di, Tri and Polysilanes; Stereoregular Polysilanes by Ring-Opening Polymerization; Polysilazane Thermosets as Precursors for Silicon Carbide and Silicon Nitride; Substituent Effects on the UV Absorption of Delta-Conjugated Polysilanes; Surface Properties of Polydimethylsiloxane-Urea-Urethane Copolymers with 1,4- Benzenedimethanol as Chain Extender; Silicon Containing Resist Materials Based on Chemical Amplification; Structure-Property Relationships in Sol-Gel-Derived Thin Films; Porous Materials ... |
|
| Evaluation of Innovative Painting Processes |
01 APR 93 |
45 pages |
| Authors:
K. Pandalai; G. Pandalai; PANDALAI COATINGS CO BRACKENRIDGE PA
|
| This report details an evaluation of two novel spray painting techniques that may decrease volatile organic compound (VOC) emissions associated with application of surface coatings. one technique uses supercritical carbon dioxide as a solvent and a propellant to deliver and disperse the coating. The second system, called the Ultra-Low Volume (ULV) process utilizes pressurized nitrogen to deliver a constant-flow, very soft spray through the gun nozzle. The CO2 system encountered ... |
|
| Proceedings of the Annual Meeting (16th) of the Adhesion Society and International Symposium on the Interphase Held in Williamsburg, VA on 21-26 February 1993 |
26 FEB 93 |
|
| Authors:
F. J. Boerio; CINCINNATI UNIV OH
|
| Partial Contents: Effects of Block Polymer Interphases on Adhesion Between Polymers; Novel Behavior of Homopolymers at Polymer/Polymer Interfaces; Molecular Dynamics Study of the Influence of Surface Chemistry on the Structure and Properties of the Interphase; Polymer/Solid Interface- A Neutron Reflectively Study; Interfacial Behavior in Poly(Styrene-b-Isoprene) Multiblock Copolymer; Adhesion Properties of Acrylic Copolymers Modified with Si-Containing Copolymers; Surface Modification of Epoxy Resin with Silicone Containing Block Copolymers; The Effect of Low ... |
|
| NRL Review for 1993 |
93 |
286 pages |
| Authors:
NAVAL RESEARCH LAB WASHINGTON DC
|
| Featured Research at NRL: Opioid Peptides-X-ray Characterization of Two Potent Enkephalin Analogs; Ultrathin Magnetic Film Research at NRL; Communicating with Chaos; Trans Oceanic Acoustic Propagation and Global Warming; Acoustics: Electroacoustic Transducer Transient Suppression: BiKR-A Range- Dependent, Normal-Mode Reverberation Model for Bistatic Geometries; Predicting Acoustic Signal Distortion in Shallow Water; Chemical/Biochemical research: Development of Polyurethane/Epoxy Based Interpenetrating Polymer Networks for Damping Applications; Ultrafast Photochemical Processes; Chemical Adhesion Across Composite Interfaces; Nanocapillarity ... |
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| Method for Bonding a Polyurethane Molding Composition to a Cable Jacket of an Olefin/Ester Interpolymer. |
23 SEP 1992 |
|
| Authors:
Thomas S. Ramotowski; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A room temperature curing polyurethane composition is bonded to the surface of cables having jackets of an olefin/ester interpolymer to provide a water resistant seal thereabout by first exposing the surface of a length of cable to an alkali metal hydroxide solution to hydrolyze the functional ester groups and thereby substitute hydroxyl groups for the organic acid of the ester in the interpolymer at the surface of the jacket. A ... |
|
| Evaluation of Seven Sealer Systems for Metallized Zinc and Aluminum Coatings in Fresh and Salt Waters |
SEP 92 |
27 pages |
| Authors:
Timothy D. Race; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL ENGINEERING AND MA TERIALS DIV
|
| A variety of metallizing systems and their recommended sealers are discussed in Civil Works guide specification CW-05036, Metallizing: Hydraulic Structures and Appurtenant Works. This study evaluated seven sealer systems for zinc and aluminum metallized coatings exposed to fresh and salt waters. Based on the results of this study, more specific recommendations for sealing metallized coatings can now be made. For zinc metallizing immersed in fresh water, the recommended sealer systems ... |
|
| Extending the Service Life of Urethane Fuel Tanks |
MAR 1992 |
35 pages |
| Authors:
Paul E. Gatza; Paul Touchet; Henry O. Feuer; Allan R. Teets; ARMY BELVOIR RESEARCH DEVELOPMENT AND ENGINEERING CENTER FORT BELVOIR VA
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| This report covers the development of an extraction/immersion test procedure for screening of candidate urethane-coated fabrics, used in collapsible fuel storage tanks. Also included are recommended changes in materials requirements for two military specifications which govern procurement of these tanks. |
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| Robotic Tactile Sensors Fabricated from a Monolithic Silicon Integrated Circuit and a Piezoelectric Polyvinylidene Fluoride Thin Film |
DEC 91 |
392 pages |
| Authors:
Craig S. Dyson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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| The purpose of this research effort was to design, fabricate, and test a tactile sensor system consisting of an external high impedance switch circuit, an external multiplexing circuit, and a tactile sensor IC. In order to accomplish this objective, a hardware design and selection process was implemented along with a logical test methodology. An external multiplexer circuit samples all of the array elements in 50 ms. The current prototype sensor ... |
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| Langmuir: The ACS Journal of Surfaces and Colloids. Volume 7, Number 11 |
NOV 91 |
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| Authors:
AMERICAN CHEMICAL SOCIETY WASHINGTON DC
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| The Symposium on Polymers Surfaces include the following topics: Polymer surfaces; Electron induced vibrational spectroscopy. A new and unique tool to unravel the molecular structure of polymer surfaces; The interface between two strongly incompatible polymers: Interfacial broadening and roughening; Electron energy loss spectroscopy of real surfaces; Static secondary ion mass spectrometry analysis of UV photopolymerization in diacetylene thin films; Surface characterization of electrically conducting nickel tetrathiooxalate; Characterization of polymer surface ... |
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