The Viscometric Properties of Polyesters. I. A Comparison between Crystalline and Amorphous Polyesters
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چکیده
منابع مشابه
Effect of Annealing on Morphology of Thermotropic Liquid Crystalline Polyesters
Liquid crystal polymers with semiflexible polymer backbone exhibit crystalline order despite of some defects in crystal packing. Isothermal heat treatment of the polymers below and above their liquid crystalline temperatures is expected to provide the necessary energy and time for the molecular chains to overcome the defects in crystal packing and to be arranged in a more perfect crystal lattic...
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چکیده ندارد.
Stilbene-containing Thermotropic Liquid Crystalline Polyesters for Aerospace Applications
Materials used in space travel must maintain thermal and dimensional stability in extreme conditions, while remaining melt processable for ease of industrial production. The rigid chemical structure of stilbene often correlates to polymers exhibiting a liquid crystalline morphology and the olefinic bond undergoes a [2 + 2] cycloaddition in the presence of UV light. Based on the combined benefit...
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Biodegradable and bioresorbable polyesters (BBPEs) are a widespread class of aliphatic polymers with a plethora of applications in the medical field. Some reports speculate that these polymers have intrinsic antibacterial activity as a consequence of their acidic degradation by-products. The release of organic acids as a result of the hydrolytic degradation of BBPEs in vivo and the resulting pH...
متن کاملSide-chain liquid-crystalline polyesters for optical information storage.
We report erasable holographic recording with a resolution of at least 2500 lines/mm on unoriented films of sidechain liquid-crystalline polyesters. Recording energies of approximately 1 J/cm(2) have been used. We have obtained a diffraction efficiency of approximately 30% with polarization recording of holograms. The holograms can be erased by heating them to approximately 80 degrees C for app...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1963
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.36.1294