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Citation: Zhang Shuyuan, Guo Kai, Zheng Shijun, Wei Hao, Wang Ke, Li Zifa. Synthesis and Characterization of ShishKebab Type Liquid Crystalline Copolymers[J]. Chinese Journal of Applied Chemistry, ;1999, 16(3): 57-61. shu

Synthesis and Characterization of ShishKebab Type Liquid Crystalline Copolymers

1.
Department of Materials Engineering, Zhengzhou University, Zhengzhou 450052

Received Date: 11 September 1998
Available Online: 11 February 1999
Fund Project: 国家自然科学基金资助项目(29674025) (29674025)

A series of thermotropic shish-kebab type liquid crystalline copolymers two mesogenic units were synthesized via solution polycondensation from 4,4'-(α,ω-octanedioyloxy) dibenzoyl dichloride, 2,5-bis[(4-hexadecoxybenzoyl)oxy] hydroquinone and 4,4'-bis(β-hydroxyethyloxy) biphenyl. The copolymers were characterized by GPC, DSC, TG, WAXD and polarizing microscope with heating stage. It was found that all the copolymers went to liquid crystal phase when heated to their melting point. The broken focal-conic texture or marble texture were observed. Both melting and isotropization temperatures showed a regular change with variation of the hydroquinone unit content in the copolymer.
- liquid crystalline,
- copolymer,
- synthesis,
- characterization
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