ICCAS OpenIR
Structure-property relationship of thermotropic liquid-crystalline vinyl polymers containing no traditional mesogen
Guan, Yan; Chen, Xiaofang; Shen, Zhihao; Wan, Xinhua; Zhou, Qifeng
2009-01-28
Source PublicationPOLYMER
ISSN0032-3861
Volume50Issue:3Pages:936-944
AbstractA series of non-mesogenic vinyl monomers, 2,5-bis(alkoxycarbonyl)styrene, were synthesized and polymerized via free radical polymerization. The alkoxy groups were systematically varied to investigate the effects of their size and architecture on the thermotropic liquid-crystalline properties of the resultant polymers. Although no traditional mesogen was present in the macromolecular structure, all the polymers revealed stable hexagonal columnar liquid-crystalline phase at the temperatures well above their glass transitions when the molecular weights were high enough, as evidenced by a combinatory analysis of differential scanning calorimetry, polarized light microscopy, and one- and two-dimensional wide-angle X-ray diffraction techniques. For the polymers containing five carbon atoms in the alkoxy terminals, the temperatures of glass transition and mesophase formation decreased and the d-spacing value of mesophase increased as the methyl substituent moved away from the connecting phenyl ring. Increasing the number of methyl group or the size of the substituent had the same effect. In the case of polymers with Y-shaped alkoxy terminals, the larger the side groups, the lower the glass-transition temperature and mesophase formation temperature and the larger the d-spacing value of mesomorphic structure. (C) 2008 Elsevier Ltd. All rights reserved.
KeywordHexagonal Columnar Mesophase (Phi(h)) Thermotropic Liquid-crystalline Property Liquid-crystalline Polymer
DOI10.1016/j.polymer.2008.12.002
Indexed BySCI
Language英语
WOS IDWOS:000263344100026
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/67056
Collection中国科学院化学研究所
Corresponding AuthorWan, Xinhua
AffiliationPeking Univ, Coll Chem & Mol Engn, Minist Educ, Beijing Natl Lab Mol Sci,Key Lab Polymer Chem & P, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Guan, Yan,Chen, Xiaofang,Shen, Zhihao,et al. Structure-property relationship of thermotropic liquid-crystalline vinyl polymers containing no traditional mesogen[J]. POLYMER,2009,50(3):936-944.
APA Guan, Yan,Chen, Xiaofang,Shen, Zhihao,Wan, Xinhua,&Zhou, Qifeng.(2009).Structure-property relationship of thermotropic liquid-crystalline vinyl polymers containing no traditional mesogen.POLYMER,50(3),936-944.
MLA Guan, Yan,et al."Structure-property relationship of thermotropic liquid-crystalline vinyl polymers containing no traditional mesogen".POLYMER 50.3(2009):936-944.
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