Sj. Zhang et al., THE SYNTHESIS AND CHARACTERIZATION OF THE NOVEL POLY(ARYL ETHER KETONE)S WITH LIQUID CRYSTALLINITY, Gaodeng xuexiao huaxue xuebao, 19(6), 1998, pp. 984-988
The novel poly(aryl ether ketone)s with liquid crystallinity were synt
hesized by nucleophilic substitution reactions of 4,4'-biphenol and su
bstituted hydroquinone with 4,4'-difluorobenzophenone and their thermo
tropic liquid crystalline properties were characterized by DSC, PLM an
d WAXD, The copolymers containing 70% biphenol formed nematic phase wh
ile the copolymer containing 50% biphenol exhibited smectic texture, T
he banded textures were formed after shearing the sample in the nemati
c liquid crystalline state. The identification of the structures in ea
ch mesogenic phase has been carried out by combining WAXD with PLM and
DSC.