Synthesis and Properties of Mesogen-Jacketed Liquid Crystalline Polymers Containing Biphenyl Mesogen with Asymmetric Substitutions
文献类型：期刊论文
| 作者 | Zhang, Lanying; Wu, Hongliang; Shen, Zhihao; Fan, Xinghe; Zhou, Qifeng |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
 |
| 出版日期 | 2011-07-15 |
| 卷号 | 49期号:14页码:3207-3217 |
| 关键词 | Liquid-crystalline Polymers (Lcp) Phase Behavior Supramolecular Structures |
| ISSN号 | 0887-624X |
| DOI | 10.1002/pola.24757 |
| 英文摘要 | This work focuses on the design, synthesis, and characterization of a series of mesogen-jacketed liquid crystalline polymers (MJLCPs), poly(alkyl 4'-(octyloxy)-2-vinylbiphenyl-4-carboxylate) (pVBP(m,8), m = 1, 2, 4, 6, 8, 10, 12). For the first time, we realized asymmetric substitutions in the mesogens of MJLCPs. The polymers obtained by conventional free radical polymerization were investigated in detail by a combination of various techniques, such as differential scanning calorimetry, wide-angle X-ray diffraction, and polarized light microscopy. Our results showed that all the polymers were thermally stable, and their glass transition temperatures decreased when m increased. The liquid crystalline (LC) phases that developed at high temperatures and disappeared at low temperatures were strongly dependent on the difference in lengths of alkyl groups on the 4 and 4' substitution positions of the side-chain biphenyl. While poly-mer pVBP(1,8) was not liquid crystalline, columnar liquid crystalline phases were observed for all other pVBP(m,8) (m = 2, 4, 6, 8, 10, 12) polymers. Polymer pVBP(8,8) showed a tetragonal columnar nematic liquid crystalline phase, and the other LC polymers exhibited columnar nematic phases. In additions, the smaller the difference in the lengths of the terminal alkyls, the easier the development of the liquid crystalline phase. Birefringence measurements showed that solution-cast polymer films exhibited moderately high positive birefringence values, indicating potential applications as optical compensation films for liquid crystal displays. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 3207-3217, 2011 |
| 语种 | 英语 |
| WOS记录号 | WOS:000291363600022 |
| 出版者 | WILEY-BLACKWELL |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/72295]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Shen, Zhihao |
| 作者单位 | Peking Univ, Coll Chem & Mol Engn, Minist Educ, Beijing Natl Lab Mol Sci,Key Lab Polymer Chem & P, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Lanying,Wu, Hongliang,Shen, Zhihao,et al. Synthesis and Properties of Mesogen-Jacketed Liquid Crystalline Polymers Containing Biphenyl Mesogen with Asymmetric Substitutions[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2011,49(14):3207-3217. |
| APA | Zhang, Lanying,Wu, Hongliang,Shen, Zhihao,Fan, Xinghe,&Zhou, Qifeng.(2011).Synthesis and Properties of Mesogen-Jacketed Liquid Crystalline Polymers Containing Biphenyl Mesogen with Asymmetric Substitutions.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,49(14),3207-3217. |
| MLA | Zhang, Lanying,et al."Synthesis and Properties of Mesogen-Jacketed Liquid Crystalline Polymers Containing Biphenyl Mesogen with Asymmetric Substitutions".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 49.14(2011):3207-3217. |
入库方式： OAI收割
来源：化学研究所
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