| Preparation and characterization of optically active amphiphilic block copolymer | |
| Zhao Fabao1,2; Liu Zhilei1; Feng Liang1; Sun Jianping1; Hu Jiwen1 | |
| 刊名 | Acta polymerica sinica
 |
| 2009-02-20 | |
| 期号 | 2页码:166-172 |
| 关键词 | Block copolymer Atom transfer radical polymerization Optically active polymer |
| ISSN号 | 1000-3304 |
| 通讯作者 | Zhao fabao() |
| 英文摘要 | Nowadays, synthetic optically active polymers are of great interests, since they might mimic the fascinating functions of naturally occurring polymers, such as nucleic acid, protein, and polysaccharide, and leading extensive studies being conducted on their synthesis, conformations and functions. in this publication, optically active diblock copolymers poly (ethylene golycol) monomethyl ether-b-poly (n-methacryloyl l-leucine methyl ester) s (mpeg-b-pmalm) s, with different mole ratios for the two blocks and narrow molecular weight distribution, were synthesized via atom transfer radical polymerization (atrp), using bromine terminated poly(ethylene glycol) monomethyl ether (mpeg-br) as macroinitiator and tris[(2-dimethylamino) ethyl] amine (me6tren)/cubr as catalytic system. the chemical structure and the mole ratio of the two blocks were verified by h-1-nmr. the molecular polydispersity,as evaluated from sec,as well as the bromine content in the prepared block copolymer,as analyzed from anion chromatography, indicate that the reaction is followed the mechanism of atrp. thermogravimetry analysis (tga),and differential scanning calorimetry (dsc) were used to evaluate the thermal properties of the prepared polymers. the specific rotation of the prepared polymers reversed against that of the monomer, and its absolute value was obviously larger than that of the monomer. it was found that the absolute value increased with the increase of weight ratio of pmalm blocks in the prepared polymers. the random conformation of the copolymer was verified by cd spectra, and it was found that the optical activity of the block copolymer was promoted with the increase of the ratio of pmalm block to mpeg block in the block copolymers. |
| WOS关键词 | TRANSFER RADICAL POLYMERIZATION ; TRIBLOCK COPOLYMER ; POLYMERS |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000263728700012 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2404773 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhao Fabao |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Chem, Guangzhou 510650, Guangdong, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao Fabao,Liu Zhilei,Feng Liang,et al. Preparation and characterization of optically active amphiphilic block copolymer[J]. Acta polymerica sinica,2009(2):166-172. |
| APA | Zhao Fabao,Liu Zhilei,Feng Liang,Sun Jianping,&Hu Jiwen.(2009).Preparation and characterization of optically active amphiphilic block copolymer.Acta polymerica sinica(2),166-172. |
| MLA | Zhao Fabao,et al."Preparation and characterization of optically active amphiphilic block copolymer".Acta polymerica sinica .2(2009):166-172. |
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