The Synthesis and Characterization of the Novel Poly(aryl ether ketone)s with Liquid Crystallinity

Abstract

Abstract: The novel poly(aryl ether ketone)s with liquid crystallinity were synthesized by nucleophilic substitution reactions of 4,4′-biphenol and substituted hydroquinone with 4,4′-difluorobenzophenone and their thermotropic liquid crystalline properties were characterized by DSC, PLMand WAXD. The copolymers containing 70% biphenol formed nematic phase while the copolymer containing 50% biphenol exhibited smectic texture. The banded textures were formed after shearing the sample in the nematic liquid crystalline state. The identification of the structures in each mesogenic phase has been carried out by combining WAXD with PLM and DSC.

Key words: Poly(aryl ether ketone), Liquid crystalline polymer, Liquid crystalline behavior

CLC Number:

O631

TrendMD:

ZHANG Shan-Ju, ZHENG Yu-Bin, WU Zhong-Wen, TIAN Ming-Wen, YANG De-Cai . The Synthesis and Characterization of the Novel Poly(aryl ether ketone)s with Liquid Crystallinity[J]. Chem. J. Chinese Universities, 1998, 19(6): 984.

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The Synthesis and Characterization of the Novel Poly(aryl ether ketone)s with Liquid Crystallinity

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