Thermotropic polyesters.: 1:: Synthesis, characterization and thermal transition of poly[4,4′-bis(ω-alkoxy)biphenyl isophthalate]

被引：20
|
作者：
Bagheri, M [1 ]
Didehban, K
Rezvani, Z
Entezami, AA
机构：
[1] Azarbaidjan Univ Tarbiat Moallem, Fac Sci, Dept Chem, Tabriz 53751 71379, Iran
[2] Tabriz Univ, Fac Chem, Polymer Lab, Tabriz 51666 14766, Iran
来源：
EUROPEAN POLYMER JOURNAL | 2004年 / 40卷 / 04期
关键词：
liquid crystals; polyesters; optical texture; DSC; odd-even effect;
D O I：
10.1016/j.eurpolymj.2003.11.026
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A new homologous series of thermotropic polyesters has been synthesized by polycondensation reaction between isophthaloyl chloride and mesogenic diols 4,4'-bis(omega-hydroxyalkoxy)biphenyl in which the spacer length is varied from 3 to 6 methylene units. The thermal behavior of the polymers has been characterized using polarized light microscopy and differential scanning calorimetry (DSC). The odd members exhibit a smectic C (S-C) phase in a narrow temperature interval, while the even members form a smectic A (S-A) phase in a broader temperature range. All of the obtained compounds were characterized by conventional spectroscopic methods. (C) 2003 Elsevier Ltd. All rights reserved.
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页码：865 / 871
页数：7
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