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首页> 外文期刊>Journal of Polymer Science, Part A. Polymer Chemistry >Liquid-crystalline thermosets from liquid-crystalline epoxy resins containing bisazomethinebiphenylene the central core: Copolymerization with a nonmesomorphic epoxy resin
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Liquid-crystalline thermosets from liquid-crystalline epoxy resins containing bisazomethinebiphenylene the central core: Copolymerization with a nonmesomorphic epoxy resin

机译：由以双偶氮次甲基联苯为中心的液晶环氧树脂制成的液晶热固性树脂：与非亚同型环氧树脂的共聚

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摘要

A new series of liquid-crystalline epoxy resins was synthesized, and their mesomorphic behavior was investigated with differential scanning calorimetry, polarized optical microscopy, and wide-angle X-ray scattering. These glycidylic compounds had central aromatic imine mesogens derived from benzidine and aliphatic spacers of up to 10 methylene units that linked the mesogens to the glycidylic groups. Crosslinking these monomers with primary aromatic diamines led to nematic networks, some of which contained crystal inclusions. However, through curing with tertiary amines as catalytic agents or through copolymerization with different proportions of the nonmesomorphic epoxy monomer and primary amines as crosslinking agents, smectic C organized thermosets were prepared when the spacers had at least four methylene carbons. When they had fewer than four, the networks were nematic. (C) 2004 Wiley Periodicals, Inc.
机译：合成了一系列新的液晶环氧树脂，并通过差示扫描量热法，偏振光学显微镜和广角X射线散射研究了它们的介晶行为。这些缩水甘油化合物具有衍生自联苯胺的中心芳族亚胺基液晶元和最多10个亚甲基单元的脂族间隔基，该亚甲基单元将介晶元连接至缩水甘油基。这些单体与伯芳族二胺交联形成向列网络，其中一些包含晶体夹杂物。但是，通过使用叔胺作为催化剂进行固化或通过与不同比例的非介晶环氧单体和伯胺作为交联剂进行共聚，当间隔基至少具有四个亚甲基碳时，可以制备出近晶C构型的热固性树脂。当它们少于四个时，网络是向列的。 （C）2004年Wiley Periodicals，Inc.

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