Vinyl-Terminated Side-Chain Liquid-Crystalline Poly(epichlorohydrin) Derivatives Containing Biphenyl and Naphthalene Mesogenic Moieties
Vinyl-Terminated Side-Chain Liquid-Crystalline Poly(epichlorohydrin) Derivatives Containing Biphenyl and Naphthalene Mesogenic Moieties
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含有联苯和萘介晶部分的乙烯基封端侧链液晶聚环氧氯丙烷衍生物
DOI：
10.1021/ma9910179
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
N. Spassky
中科院分区：
文献类型：
--
作者：
L. Callau;J. Reina;A. Mantecon;M. Tessier;N. Spassky
用介晶酸（4 ′-（ω-烯氧基）-4-联苯羧酸和6-（ω-烯氧基）-2-萘羧酸）对聚环氧氯丙烷（PECH）进行了大范围的改性，得到了侧链液晶聚合物，该侧链液晶聚合物可通过其末端双键进一步交联。裂解和交联的副反应，已在其他地方报道，观察到。用NMR、IR、SEC-MALLS、粘度计、元素分析、DSC和TGA等手段对聚合物进行了表征。改性聚合物的热稳定性高于起始PECH的热稳定性。通过DSC、偏光显微镜和X射线衍射对中间相进行了表征。联苯衍生物显示出由双层或部分双层结构组成的近晶A中间相，这对于4 '-（5-己烯氧基）-4-联苯羧酸衍生物（SA）是可调节的。6-（5-己烯氧基）-2-萘甲酸和6-（10-十一烯氧基）-2-萘甲酸衍生物显示出良好的生物活性。
Poly(epichlorohydrin) (PECH) was modified to a considerable extent with mesogenic acids, namely 4‘-(ω-alkenoxy)-4-biphenylcarboxylic acids and 6-(ω-alkenoxy)-2-naphthalenecarboxylic acids, which leads to side chain liquid crystalline polymers which can be cross-linked through their terminal double bonds in a further step. Cleavage and cross-linking side reactions, which have been reported elsewhere, were observed. The polymers were characterized by NMR, IR, SEC-MALLS, viscosimetry, elemental analysis, DSC, and TGA. The thermal stability of the modified polymers was higher than that of the starting PECH. The mesophases were identified by DSC, light-polarized optical microscopy, and X-ray diffraction. The biphenyl derivatives show smectic A mesophases consisting of a bilayer or partial bilayer structure, which is modulated for the 4‘-(5-hexenoxy)-4-biphenylcarboxylic acid derivatives (SA). The 6-(5-hexenoxy)-2-naphthalenecarboxylic acid and the 6-(10-undecenoxy)-2-naphthalenecarboxylic acid derivatives show...