Synthesis and characterization of PCL/PEG/PCL triblock copolymers by using calcium catalyst
文献类型：期刊论文
| 作者 | Piao, LH; Dai, ZL; Deng, MX; Chen, XS; Jing, XB |
| 刊名 | POLYMER
 |
| 出版日期 | 2003-03-01 |
| 卷号 | 44期号:7页码:2025-2031 |
| 关键词 | Triblock Copolymer Calcium Catalyst Poly(Epsilon-caprolactone) |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/S0032-3861(03)00087-9 |
| 英文摘要 | Triblock copolymer PCL-PEG-PCL was prepared by ring-opening polymerization of epsilon-caprolactone (CL) in the presence of poly(ethylene glycol) catalyzed by calcium ammoniate at 60 degreesC in xylene solution. The copolymer composition and triblock structure were confirmed by H-1 NMR and C-13 WR measurements. The differential scanning calorimetry and wide-angle X-ray diffraction analyses revealed the micro-domain structure in the copolymer. The melting temperature T-c and crystallization temperature T-c of the PEG domain were influenced by the relative length of the PCL blocks. This was caused by the strong covalent interconnection between the two domains. Aqueous micelles were prepared from the triblock copolymer. The critical micelle concentration was determined to be 0.4-1.2 mg/l by fluorescence technique using pyrene as probe, depending on the length of PCL blocks, and lower than that of corresponding PCL-PEG diblock copolymers. The H-1 NMR spectrum of the micelles in D2O demonstrated only the -CH2CH2O- signal and thus confirmed. the PCL-core/PEG-shell structure of the micelles. (C) 2003 Published by Elsevier Science Ltd. |
| 语种 | 英语 |
| WOS记录号 | WOS:000181517100005 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/81409]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Jing, XB |
| 作者单位 | Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Piao, LH,Dai, ZL,Deng, MX,et al. Synthesis and characterization of PCL/PEG/PCL triblock copolymers by using calcium catalyst[J]. POLYMER,2003,44(7):2025-2031. |
| APA | Piao, LH,Dai, ZL,Deng, MX,Chen, XS,&Jing, XB.(2003).Synthesis and characterization of PCL/PEG/PCL triblock copolymers by using calcium catalyst.POLYMER,44(7),2025-2031. |
| MLA | Piao, LH,et al."Synthesis and characterization of PCL/PEG/PCL triblock copolymers by using calcium catalyst".POLYMER 44.7(2003):2025-2031. |
入库方式： OAI收割
来源：化学研究所
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