ICCAS OpenIR
Shear induced molecular alignments of a side-chain liquid crystalline polyacetylene containing biphenyl mesogens
Geng, JX; Zhao, XG; Zhou, EL; Li, G; Lam, JWY; Tang, BZ
2003-12-01
Source PublicationPOLYMER
ISSN0032-3861
Volume44Issue:26Pages:8095-8102
AbstractMesomorphic properties of a side chain liquid crystalline polyacetylene, poly(11-{[(4'-heptyloxy-4-biphenylyl)carbonyl]oxy}-1-undecyne) (PA9EO7), are investigated using polarized optical microscope, X-ray diffraction, and transmission electron microscope. Polymer PA9EO7 forms enantiotropic smectic A and smectic B phases. It also exhibits an additional high order smectic phase, a sandwich structure consisting of different molecular packing of biphenyl mesogenic moieties from that of alkyl spacers and terminals, when it is prepared from its toluene solution. Shearing the polymer film at its smectic A phase generates banded texture with the alignment of the backbones parallel to the direction of shear force. While at its high order smectic phase, the mesogen pendants of the polymer are arranged parallel to the direction of shear. The different mesomorphic behaviors arise from different molecular alignments influenced by the fluidity. (C) 2003 Elsevier Ltd. All rights reserved.
KeywordLiquid-crystalline Polymer Polyacetylenes Shear Orientation
DOI10.1016/j.polymer.2003.10.044
Indexed BySCI
Language英语
WOS IDWOS:000186949800036
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79896
Collection中国科学院化学研究所
Corresponding AuthorLi, G
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Geng, JX,Zhao, XG,Zhou, EL,et al. Shear induced molecular alignments of a side-chain liquid crystalline polyacetylene containing biphenyl mesogens[J]. POLYMER,2003,44(26):8095-8102.
APA Geng, JX,Zhao, XG,Zhou, EL,Li, G,Lam, JWY,&Tang, BZ.(2003).Shear induced molecular alignments of a side-chain liquid crystalline polyacetylene containing biphenyl mesogens.POLYMER,44(26),8095-8102.
MLA Geng, JX,et al."Shear induced molecular alignments of a side-chain liquid crystalline polyacetylene containing biphenyl mesogens".POLYMER 44.26(2003):8095-8102.
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