Effect of the terminal substituent of azobenzene on the properties of ABA triblock copolymers via atom transfer radical polymerization
文献类型：期刊论文
| 作者 | Tang, Xinde; Gao, Longcheng; Fan, Xinghe; Zhou, Qifeng |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
 |
| 出版日期 | 2007-11-15 |
| 卷号 | 45期号:22页码:5190-5198 |
| 关键词 | Aba Triblock Copolymers Atom Transfer Radical Polymerization (Atrp) Azo Polymers Azobenzene Block Copolymers Liquid-crystalline Polymers (Lcp) Liquid-crystalline Property Photoresponsive Property Terminal Substituents |
| ISSN号 | 0887-624X |
| DOI | 10.1002/pola.22263 |
| 英文摘要 | The effect of the terminal substituent of azobenzene on the properties of ABA triblock copolymers was investigated. For this study, three kinds of azobenzene-containing monomers with different terminal substituents-6-[4-(4-methoxyphenylazo)phenoxy] hexyl methacrylate, 6-[4-(4-ethoxyphenylazo)phenoxy]hexyl methacrylate, and 6-[4-(4nitrophenylazo)phenoxy]hexyl methacrylate-were used to synthesize ABA triblock copolymers PMMAzo(25)-PEG(13)-PMMAzo(25)/PMMAzo(12)-PEG(13)-PMMAzo(12), PEMAzo(14)-PEG(13)-PEMAzo(14) and]PNMAzo(14)-]PEG(13)-PNMAzo(14), respectively, by atom transfer radical polymerization (PMMAzo is poly(6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate), PEMAzo is poly[6-[4-(4-ethoxyphenylazo)phenoxy]hexyl methacrylate), and PNMAzo is poly{6-[4-(4-nitrophenylazo)phenoxy]hexyl methacrylatel). These copolymers were characterized with H-1 NMR spectroscopy and gel permeation chromatography and exhibited controlled molecular weights and narrow molecular weight distributions. Differential scanning calorimetry and polarizing optical microscopy showed that these copolymers had mesophases. PMMAo(25)-PEG(13)-PMALAzo(25) and PMAIAzo(12)-PEG(13)-PMMAzo(12) had a smectic mesophase and a nematic mesophase, whereas both PEMAzo(14)-PEG(13)-PEMAzo(14) and PNMAzo(14) -PEG(13)-PNMAzo(14) had a nematic mesophase. This demonstrated that the liquid-crystalline properties of these copolymers highly depended on the terminal substituent of azobenzene. The photoresponsive behavior of these copolymers was also investigated in tetrahydrofuran solutions, and the influence of the terminal substituents attached to azobenzene was studied. (c) 2007 Wiley Periodicals, Inc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000250788600016 |
| 出版者 | WILEY-BLACKWELL |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/60669]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Fan, Xinghe |
| 作者单位 | 1.Peking Univ, Minist Educ, Beijing Natl Lab Mol Sci,Coll Chem & Mol Engn, Key Lab Polymer Chem & Phys,Dept Polymer Sci & En, Beijing 100871, Peoples R China 2.Shanghai Jiao Tong Univ, Inst New Mat, Jinan 250023, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Xinde,Gao, Longcheng,Fan, Xinghe,et al. Effect of the terminal substituent of azobenzene on the properties of ABA triblock copolymers via atom transfer radical polymerization[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2007,45(22):5190-5198. |
| APA | Tang, Xinde,Gao, Longcheng,Fan, Xinghe,&Zhou, Qifeng.(2007).Effect of the terminal substituent of azobenzene on the properties of ABA triblock copolymers via atom transfer radical polymerization.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,45(22),5190-5198. |
| MLA | Tang, Xinde,et al."Effect of the terminal substituent of azobenzene on the properties of ABA triblock copolymers via atom transfer radical polymerization".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 45.22(2007):5190-5198. |
入库方式： OAI收割
来源：化学研究所
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