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首页> 外文期刊>Journal of Applied Polymer Science >Functional polyesters and copolyesters based on the 4,4 '-dihydroxy-alpha-methylstilbene
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Functional polyesters and copolyesters based on the 4,4 '-dihydroxy-alpha-methylstilbene

机译：基于4,4'-二羟基-α-甲基methyl的功能性聚酯和共聚酯

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Liquid crystalline( LC) thermotropic main-chain polyesters and copolyesters based on 4,4'-dihydroxy-alpha-methylstilbene (mesogen) and azelaoyl chloride (flexible spacer) and 10,12-docosadiynedioyl chloride [ultraviolet (UV)-crosslinkable moiety ] were synthesized by interfacial polymerization. Improvement of molecular weight was achieved by the modification of interfacial polymerization. Molecular weights of the LC polymers ranged from 13,000 to 56,500 g/mol(-1), depending on composition of the LC polymers. Mesomorphic properties of these polymers were studied, and phase diagrams were established. Polymers showed nematic and smectic mesophases, depending on the flexible spacer composition. UV-crosslinking of the LC polymers containing W-sensitive diacetylenic groups was attempted, and crosslinked LC polymer films were obtained. Mechanical properties of LC polymer films were also studied with a dynamic mechanical analyzer. The storage moduli of the polymer films, depending on the molecular weight of the polymers, increased by the W-crosslinking. Higher molecular weights and crosslinking were favorable for the higher storage moduli of the films. The effect of orientation on the mechanical properties was also studied, and it was found that orientation induced the increase of the moduli of the films. (C) 1998 John Wiley & Sons, Inc. [References: 9]
机译：基于4,4'-二羟基-α-甲基sti（介晶）和壬二酰氯（柔性间隔基）和10,12-二十二碳二烯酰氯[紫外线（UV）-可交联部分]的液晶（LC）热致性主链聚酯和共聚酯通过界面聚合合成。通过改性界面聚合实现分子量的提高。 LC聚合物的分子量范围为13,000至56,500 g / mol（-1），具体取决于LC聚合物的组成。研究了这些聚合物的介晶性质，并建立了相图。聚合物显示出向列和近晶中间相，这取决于柔性间隔基的组成。尝试对包含W敏感的二炔基的LC聚合物进行UV交联，并获得交联的LC聚合物膜。还使用动态机械分析仪研究了LC聚合物薄膜的机械性能。聚合物膜的存储模量取决于聚合物的分子量，通过W-交联而增加。较高的分子量和交联有利于膜的较高的存储模量。还研究了取向对机械性能的影响，并且发现取向引起了膜的模量的增加。 （C）1998 John Wiley＆Sons，Inc. [参考：9]

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