Study of the synthesis, crystallization, and morphology of poly(ethylene glycol)-poly(is an element of-caprolactone) diblock copolymers
文献类型：期刊论文
| 作者 | He CL ; Sun J ; Deng C ; Zhao T ; Deng MX ; Chen XS ; Jing XB |
| 刊名 | biomacromolecules
 |
| 出版日期 | 2004 |
| 卷号 | 5期号:5页码:2042-2047 |
| 关键词 | RING-OPENING POLYMERIZATION BLOCK-COPOLYMERS TRIBLOCK COPOLYMERS CALCIUM CATALYST L-LACTIDE ISOTHERMAL CRYSTALLIZATION MELTING BEHAVIOR CAPROLACTONE SPHERULITES SEQUENCES |
| ISSN号 | 1525-7797 |
| 通讯作者 | chen xs |
| 中文摘要 | poly(ethylene glycol) -poly(epsilon-caprolactone) diblock copolymers peg-pcl were synthesized by ring-opening polymerization of c-caprolactone using monomethoxy poly(ethylene glycol) as the macroinitiator and calcium ammoniate as the catalyst. obvious mutual influence between peg and pcl crystallization was studied by altering the relative block length. fixing the length of the peg block (m-n = 5000) and increasing the length of the pcl block, the crystallization temperature of the pcl block rose gradually from i to about 35 degreesc while that of the peg block dropped from 36 to -6.6 degreesc. meanwhile, the melting temperature of the pcl block went up from 30 to 60 degreesc, while that of the peg block declined from 60 to 41 degreesc. if the pcl block was longer than the peg block, the former would crystallize first when cooling from a molten state and led to obviously imperfect crystallization of peg and vice versa. and they both crystallized at the same temperature, if their weight fractions were equal. we found that the peg block could still crystallize at -6.6 degreesc even when its weight fraction is only 14%. a unique morphology of concentric spherulites was observed for peg5000-pcl5000. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000224077000058 |
| 公开日期 | 2010-08-17 |
| 源URL | [http://202.98.16.49/handle/322003/15465]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | He CL,Sun J,Deng C,et al. Study of the synthesis, crystallization, and morphology of poly(ethylene glycol)-poly(is an element of-caprolactone) diblock copolymers[J]. biomacromolecules,2004,5(5):2042-2047. |
| APA | He CL.,Sun J.,Deng C.,Zhao T.,Deng MX.,...&Jing XB.(2004).Study of the synthesis, crystallization, and morphology of poly(ethylene glycol)-poly(is an element of-caprolactone) diblock copolymers.biomacromolecules,5(5),2042-2047. |
| MLA | He CL,et al."Study of the synthesis, crystallization, and morphology of poly(ethylene glycol)-poly(is an element of-caprolactone) diblock copolymers".biomacromolecules 5.5(2004):2042-2047. |
入库方式： OAI收割
来源：长春应用化学研究所
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