LIQUID-CRYSTAL BEHAVIOR OF POLY(ETHYLENE-TEREPHTHALATE) PARA-HYDROXYBENZOIC ACID POLY(ETHYLENE DODECATE) COPOLYMER

被引：0
|
作者：
CHANG, DS [1 ]
JIANG, JD [1 ]
ISHIZAKA, H [1 ]
OKUYAMA, K [1 ]
FUKUMOTO, O [1 ]
机构：
[1] TOKYO UNIV AGR & TECHNOL,FAC TECHNOL,KOGANEI,TOKYO 184,JAPAN
来源：
KOBUNSHI RONBUNSHU | 1991年 / 48卷 / 07期
关键词：
THERMOTROPIC LIQUID-CRYSTAL; POLYESTER ELASTOMER; POLY(ETHYLENE TEREPHTHALATE); P-HYDROXYBENZOIC ACID; POLY(ETHYLENE DODECATE) COPOLYMER; DSC; POLARIZING MICROSCOPE; X-RAY DIFFRACTION;
D O I：
10.1295/koron.48.411
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 crystal behavior of poly(ethylene terephthalate) (PET)/p-hydroxybenzoic acid (PHB)/poly(ethylene dodecate) (PED) block copolymer has been studied by DSC, polarizing microscopy, and X-ray diffraction method. The results show that the block copolymer is in a thermotropic liquid-crystal state in a considerably wide temperature range. The transition from the crystal state to nematic liquid-crystal state takes place as temperature increases and by further increase of temperature the transition from nematic to more ordered (probably smectic) liquid-crystal state takes place. This process is thermally reversible: crystal reversible nematic reversible smectic. So far, this kind of behavior was scarcely reported.
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页码：411 / 417
页数：7
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