Studies on structure of oriented film of a chiral side chain liquid crystalline polymer

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	Studies on structure of oriented film of a chiral side chain liquid crystalline polymer
	Song, WH; Chen, SX; Jin, YZ; Zhang, SF
刊名	ACTA POLYMERICA SINICA
	1999-02-01
期号	1 页码:80-86
关键词	Chiral Side Chain Liquid Crystalline Polymer Oriented Structure Banded Texture
ISSN号	1000-3304
英文摘要	The peculiarities of orientation in a chiral side chain liquid crystalline polymer by action shear stress were studied. The mesophases and phase transition temperatures of chiral sidechain LCP Ps-ll are: crystalline-Sc* phase (90 degrees C), Sc-S-A phase (98 degrees C) an S-A-isotropic phase (117 degrees C), determined by DSC and POM with a hot-stage. The polymer Ps-ll shows typical focal-conic texture is SA phase and straited focal-conic texture in twisted Sc phase. A typical banded texture with parallel bands extended in a direction perpendicular to the shear direction can be observed during quenching from the sheared melt at the temperature of SA phase. The width of bands is about 1 mu m Infrared dichroism of the oriented film reveal that the orientation of the side chains containing mesogen tend to be normal to the sheer direction in the oriented film, which means the smectic layers tend to parallel to shear direction because of mesogenic director normal to layer. X-ray diffraction pattern indicates that the bilayered superstructure of smectic phase, which can be attributed to an antiferroelectric ordering exist in this polymer. The relaxation behavior of the oriented film exhibits that orientation history is useful for the growth of smectic layer and ordered focal-conic texture can rapidly be formed in the oriented film during the heat treatment.
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000078636200014
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/75229]
专题	中国科学院化学研究所
通讯作者	Song, WH
作者单位	Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Song, WH,Chen, SX,Jin, YZ,et al. Studies on structure of oriented film of a chiral side chain liquid crystalline polymer[J]. ACTA POLYMERICA SINICA,1999(1):80-86.
APA	Song, WH,Chen, SX,Jin, YZ,&Zhang, SF.(1999).Studies on structure of oriented film of a chiral side chain liquid crystalline polymer.ACTA POLYMERICA SINICA(1),80-86.
MLA	Song, WH,et al."Studies on structure of oriented film of a chiral side chain liquid crystalline polymer".ACTA POLYMERICA SINICA .1(1999):80-86.