MASSACHUSETTS UNIV AMHERST DEPT OF POLYMER SCIENCE AND ENGINEERING
Click on the titles below to find US government-authored or -collected reports written by MASSACHUSETTS UNIV AMHERST DEPT OF POLYMER SCIENCE AND ENGINEERING
Two different types of polymers were synthesized and their degradation and combustion behavior were investigated. The first class, 1,1- dichloro-2,2-(4-hydroxyphenyl)ethylidene (bisphenol C) based polymers, were found to be among the most fire- resistant polymers with peak heat release capacities as low as 20 J/g-K. Polymers containing bisphenol C all exhibited exothermic decomposition behavior. When compared to corresponding bisphenol-A- based polymers, these bisphenol-C- containing ...
Enhancements in ballistic protective wear for soldiers rely heavily on the development of lightweight materials with increased moduli and strength. It is well established that an armors ballistic limit can be increased significantly by using materials with increased moduli and strength. The development of high performance fibers from flexible chain polymers has been a subject of intense interest over the past 30 years. However, to ...
Several investigations concerning the synthesis, structure and properties of polyphenylene vinylene (PPV) and related macromolecules with novel electro-optical characteristics have been completed. Selected homopolymers and copolymers of systematic ally varying architecture have been designed and synthesized and shown to be highly efficient chromophores in electroluminescent devices. Several of these polymers have also been shown to be efficient lasing materials in optically-pumped configurations. The study of ...
Conjugated/non-conjugated alternating block copolymers containing cyano-modified distirylbenzene units as emitting chromophores were synthesized via Knoevenagel and Wittig reactions; the non-conjugated block was an alkylene spacer. The polymers were differentiated with respect to the location of the cyano groups in the chromophoric block (double bond or phenylene ring). When photoluminescence and electroluminescence spectra of these materials were compared with those of a similar structure without ...
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