ICCAS OpenIR
Studies on structure of oriented film of a chiral side chain liquid crystalline polymer
Song, WH; Chen, SX; Jin, YZ; Zhang, SF
1999-02-01
Source PublicationACTA POLYMERICA SINICA
ISSN1000-3304
Issue1Pages:80-86
AbstractThe 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.
KeywordChiral Side Chain Liquid Crystalline Polymer Oriented Structure Banded Texture
Indexed BySCI
Language英语
WOS IDWOS:000078636200014
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/75230
Collection中国科学院化学研究所
Corresponding AuthorSong, WH
AffiliationChinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
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.
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