ICCAS OpenIR
Synthesis and characterization of a thermotropic liquid-crystalline poly[2,5-bis(4 ' alkoxycarbonylphenyl)styrene]
Zhu, Zhiguo; Zhi, Junge; Liu, Anhua; Cui, Jiaxi; Tang, Hui; Qiao, Wenqiang; Wan, Xinhua; Zhou, Qifeng
2007-03-01
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume45Issue:5Pages:830-847
AbstractWe report the synthesis and characterization of a series of novel mesogen-jacketed liquid-crystalline polymers, poly[2,5-bis(4-alkoxycarbonylphenyl)styrenels (1-m, where m is the number of carbon atoms in the alkyl tails), along with the corresponding monomers, 2,5-bis(4'-alkoxycarbonylphenyl)styrenes (2-m), and their precursors, 2,5-bis(4'-alkoxycarbonylphenyl)toluenes (3-m). The influence of the tail length on the thermotropic properties of the two types of low-molecular-mass compounds and macromolecules was investigated with a combination of differential scanning calorimetry, polarized optical microscopy, and wide-angle X-ray diffraction techniques. Except for compound 3-3, which exhibited a monotropic nematic phase, all members of the low-molar-mass molecules developed no mesophase during both heating and cooling processes. The glass-transition temperatures of the polymers decreased as the tail lengths increased. The 5% weight loss temperatures of all the polymers under a nitrogen atmosphere were above 360 degrees C, indicating quite high thermal stability. Although polymers 1-1 and 1-2 were non-liquid-crystalline, columnar nematic phases were observed for the remaining homopolymers with longer alkyl tails. The mesophases of 1-3 to 1-9 that developed at high temperatures remained upon cooling to room temperature, whereas those of 1-10 to 1-12 disappeared during the cooling process. (c) 2007 Wiley Periodicals, Inc.
KeywordMesogen-jacketed Liquid-crystalline Polymer Radical Polymerization Structure-property Relations Alkyl Tail Length Columnar Nematic Phase P-terphenyl Poly[2 5-bis(4 '-alkoxycarbonylphenyl)Styrene]
DOI10.1002/pola.21845
Indexed BySCI
Language英语
WOS IDWOS:000244267700012
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:44[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/62354
Collection中国科学院化学研究所
Corresponding AuthorWan, Xinhua
AffiliationPeking Univ, Beijing Natl Lab Mol Sci, Key Lab Polymer Chem & Phys, Minist Educ,Coll Chem & Mol Engn, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Zhiguo,Zhi, Junge,Liu, Anhua,et al. Synthesis and characterization of a thermotropic liquid-crystalline poly[2,5-bis(4 ' alkoxycarbonylphenyl)styrene][J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2007,45(5):830-847.
APA Zhu, Zhiguo.,Zhi, Junge.,Liu, Anhua.,Cui, Jiaxi.,Tang, Hui.,...&Zhou, Qifeng.(2007).Synthesis and characterization of a thermotropic liquid-crystalline poly[2,5-bis(4 ' alkoxycarbonylphenyl)styrene].JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,45(5),830-847.
MLA Zhu, Zhiguo,et al."Synthesis and characterization of a thermotropic liquid-crystalline poly[2,5-bis(4 ' alkoxycarbonylphenyl)styrene]".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 45.5(2007):830-847.
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