首页|Synthesis and properties of liquid crystalline polyurethanes from 4,4-bis (6-hydroxyhexoxy) biphenyl and 3,3'-dimethyl-4, 4'-biphenylene diisocyanate

Synthesis and properties of liquid crystalline polyurethanes from 4,4-bis (6-hydroxyhexoxy) biphenyl and 3,3'-dimethyl-4, 4'-biphenylene diisocyanate

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  • Trans Tech Publications Ltd
A thermotropic liquid crystalline polyurethane (LCPU) was synthesized by the polyaddition reaction of 3,3'-dimethyl-4,4'-biphenylene diisocyanate (TOD1) with 4,4-bis(6-hydroxyhexoxy)biphenyl (BHHBP). The liquid crystalline behavior of the polymer was investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), wide angle X-ray diffraction (WAXD). The LCPU exhibited a nematic phase with a threaded texture and had a wide mesophase temperature range. And thermogravimetric analysis (TGA) indicated the decomposition temperature of the LCPU was >300℃. The observation of POM showed that the LCPU was a thermotropic nematic liquid crystalline polymer at certain temperature range.

liquid crystalline polyurethanenematic phasethermotropic nematic liquid crystallinestructure-property relations

Xiao-Dong Chen、Nan-Qiao Zhou、Hai Zhang

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National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, Guangdong 510640, China GuangZhou SCUT Bestry Technology Joint-stock Co., Ltd., South China University of Technology, Guangzhou, Guangdong 510640, China

National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, Guangdong 510640, China

GuangZhou SCUT Bestry Technology Joint-stock Co., Ltd., South China University of Technology, Guangzhou, Guangdong 510640, China

2010

10.4028/www.scientific.net/KEM.428-429.144

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.428/429
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