Four-armed PCL-b-PDLA diblock copolymer: 1. Synthesis, crystallization and degradation
文献类型：期刊论文
| 作者 | Ning, Zhenbo1,3; Jiang, Ni1; Gan, Zhihua1,2 |
| 刊名 | POLYMER DEGRADATION AND STABILITY
 |
| 出版日期 | 2014-09-01 |
| 卷号 | 107页码:120-128 |
| 关键词 | Four-armed Diblock Copolymers Pcl Pdla Crystallization Enzymatic Degradation Alkaline Treatment |
| ISSN号 | 0141-3910 |
| DOI | 10.1016/j.polymdegradstab.2014.05.016 |
| 英文摘要 | A series of four-armed poly(a-caprolactone)-b-poly(o-lactic acid) diblock copolymers (4a-PCL-b-PDLA) with well controlled composition were synthesized. The effect of length of PCL and PDLA blocks on the crystallization and enzymatic/alkaline degradation was studied. It was found that the PDLA blocks have great influence on the crystallization of PCL blocks under two different crystallization conditions. The copolymers with shorter PDLA blocks showed faster degradation rate but different spherulite structures after enzymatic degradation or alkaline degradation. The morphological changes of spherulites depended on the PCL chains which were trapped inside or excluded from the spherulites of PDLA when the copolymer crystallized at 80 degrees C or 30 degrees C (i.e. above or lower the glass transition temperature of PDLA chains). The spherulite morphology and porous morphology of copolymer films after degradation were well discussed. This work revealed that the crystalline morphology and degradation rate of PCL-b-PDLA films could be well controlled by copolymer composition and confined crystallization of PCL chains within the previously formed lamellar stacks of PDLA. (C) 2014 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000342269600014 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/51965]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Jiang, Ni |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China 2.Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ning, Zhenbo,Jiang, Ni,Gan, Zhihua. Four-armed PCL-b-PDLA diblock copolymer: 1. Synthesis, crystallization and degradation[J]. POLYMER DEGRADATION AND STABILITY,2014,107:120-128. |
| APA | Ning, Zhenbo,Jiang, Ni,&Gan, Zhihua.(2014).Four-armed PCL-b-PDLA diblock copolymer: 1. Synthesis, crystallization and degradation.POLYMER DEGRADATION AND STABILITY,107,120-128. |
| MLA | Ning, Zhenbo,et al."Four-armed PCL-b-PDLA diblock copolymer: 1. Synthesis, crystallization and degradation".POLYMER DEGRADATION AND STABILITY 107(2014):120-128. |
入库方式： OAI收割
来源：化学研究所
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