Thermal degradation of star-shaped poly(epsilon-caprolactone)
文献类型：期刊论文
| 作者 | Xie, Wenyuan1,2; Gan, Zhihua1 |
| 刊名 | POLYMER DEGRADATION AND STABILITY
 |
| 出版日期 | 2009-07-01 |
| 卷号 | 94期号:7页码:1040-1046 |
| 关键词 | Thermal Degradation Star-shaped Poly(Epsilon-caprolactone) Multi-armed Structure Molecular Weight Pyrolytic Products |
| ISSN号 | 0141-3910 |
| DOI | 10.1016/j.polymdegradstab.2009.04.005 |
| 英文摘要 | Thermal degradation of a serials of star-shaped poly(epsilon-caprolactone) (PCL) with well-defined arm numbers and arm length was investigated. The weight loss of star-shaped PCL during heating process showed a two-stage character, and its dependence on molecular weight and multi-armed structure was well discussed. It was found that the thermal stability could be improved not only by increasing molecular weight but also by increasing arm numbers when the molecular weight is in a certain range. Based on the analyses of pyrolytic products by (1)H NMR and TGA-FTIR, two mechanisms of thermal degradation for the random cleavage of ester bonds of PCL chains were proposed. Ester bonds were pyrolyzed into alkene and carboxyl functional groups in mechanism I while they were pyrolyzed into ketene and hydroxyl functional groups in mechanism II. The effects of multi-armed structure of star-shaped PCL on the cleavage of ester bonds of PCL chains were discussed in terms of the limitation of central "core" on mobility of each PCL arm. Combined the results of viscosity analysis with thermal analysis, it could be concluded that both thermal stability and processability of PCL materials can be improved by controlling the multi-armed structures. (C) 2009 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000267815700002 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/66059]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Gan, Zhihua |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, Wenyuan,Gan, Zhihua. Thermal degradation of star-shaped poly(epsilon-caprolactone)[J]. POLYMER DEGRADATION AND STABILITY,2009,94(7):1040-1046. |
| APA | Xie, Wenyuan,&Gan, Zhihua.(2009).Thermal degradation of star-shaped poly(epsilon-caprolactone).POLYMER DEGRADATION AND STABILITY,94(7),1040-1046. |
| MLA | Xie, Wenyuan,et al."Thermal degradation of star-shaped poly(epsilon-caprolactone)".POLYMER DEGRADATION AND STABILITY 94.7(2009):1040-1046. |
入库方式： OAI收割
来源：化学研究所
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