Cylindrical Molecular Brushes with a Loose Grafting Density
文献类型：期刊论文
| 作者 | Deng, Guohua3; Chen, Yongming1,2 |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
 |
| 出版日期 | 2009-10-15 |
| 卷号 | 47期号:20页码:5527-5533 |
| 关键词 | Atrp Copolymerization Graft Copolymers Molecular Brushes |
| ISSN号 | 0887-624X |
| DOI | 10.1002/pola.23603 |
| 英文摘要 | A cylindrical molecular brush with a low graft density was synthesized by two steps. Firstly, free radical alternating copolymerization of styrene (St) and N-[2-(2-bromoisobutyryloxy)ethyl] maleimide (BiBEMI) gave a macroinitiator where pendant initiating sites for atom transfer radical polymerization (ATRP) being positioned along the backbone with an interval of four C-C bonds. The backbone-to-be with an alternating sequence was verified by elemental analysis (EA). Secondly, grafting poly(tert-butyl acrylate) chains from the macroinitiator by ATRP produced the novel molecular brush. Size exclusion chromatography, static light scattering (SLS), and (1)H NMR and atomic force microscopy (AFM) were used to characterize the macroinitiator and the molecular brush. The results show that the backbone contains an average 730 repeat units (1 repeat unit = a pair of St and BiBEMI) and the absolute molecular weight of the brush, M(w,sLS), was 4.88 x 10(6) Da. The brush reveals a number average length L(n) to be 96 nm under AFM observation on carbon coated mica, corresponding to the length per main chain monomer unit (L(unit)) of 0.066 nm, indicating a less extended conformation due to the low grafting density. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 5527-5533, 2009 |
| 语种 | 英语 |
| WOS记录号 | WOS:000270692100031 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/66353]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Chen, Yongming |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100190, Peoples R China 2.Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Deng, Guohua,Chen, Yongming. Cylindrical Molecular Brushes with a Loose Grafting Density[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2009,47(20):5527-5533. |
| APA | Deng, Guohua,&Chen, Yongming.(2009).Cylindrical Molecular Brushes with a Loose Grafting Density.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,47(20),5527-5533. |
| MLA | Deng, Guohua,et al."Cylindrical Molecular Brushes with a Loose Grafting Density".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 47.20(2009):5527-5533. |
入库方式： OAI收割
来源：化学研究所
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