Synthesis and curing of liquid-crystalline epoxy resins containing a biphenyl mesogen

被引：27
作者：
Liu, Guodong [1 ]
Gao, Jungang
Song, Lili
Hou, Wenjun
Zhang, Liucheng
机构：
[1] Hebei Univ Technol, Inst Polymer Sci & Engn, Tianjin 300130, Peoples R China
[2] Hebei Univ, Col Chem & Environm Sci, Baoding 071002, Peoples R China
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2006年 / 207卷 / 23期
关键词：
activation energy; curing of polymers; epoxy; liquid-crystalline polymers (LCP); networks;
D O I：
10.1002/macp.200600372
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Liquid crystalline epoxies with a biphenyl mesogenic group have been widely studied although it is still in contention as to whether the diglycidyl ether of DGEBP shows a thermotropic phase. DEPBP was synthesized by partial oxidation and the liquid crystalline properties were investigated. Despite their similar structures their molecular weights are quite different. DEPBP has a distinct molecular weight, while DGEBP shows a molecular weight distribution. DEPEBP was also synthesized and characterized to investigate the influence of the flexible spacer. By incorporation of a flexible ethoxy group, the monomer shows no thermotropic property even in its curing reaction with an aromatic diamine, DDM. The curing rate was decelerated and the cured network showed a T-g even lower than that of cured DGEBA/DDM. The curing kinetics of DEPBP and DEPEBP were also tentatively investigated.
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收藏
页码：2222 / 2231
页数：10
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