Photodegradation behavior and mechanism of polycaprolactone-poly(ethylene oxide) block copolymer
文献类型：期刊论文
| 作者 | Bei, JZ; He, WS; Hu, XZ; Wang, SG |
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 1999-10-01 |
| 期号 | 5页码:627-630 |
| 关键词 | Photodegradation Polycaprolactone-poly(Ethylene Oxide) Block Copolymer Photodegradation Mechanism |
| ISSN号 | 1000-3304 |
| 英文摘要 | The biodegradation behavior in vitro and in vivo of polycaprolactone-poly(ethylene oxide) block copolymers (PCE) has been reported in detail. Photodegradation test of PCE was performed by exposure to UV light. The mechanical properties and the inherent viscosity of PCE samples which are subjected to photodegradation were determined. The photodegradation rate of PCE was much more faster than its hydrolysis rate and was increased with increasing poly(ethylene oxide) content. The experimental results also indicated that the pure poly(ethylene oxide) (PEO) can not be photodegraded alone. A mechanism for the photodegradation of PCE copolymers was proposed:the carbonyl groups in PCL segments catalyze the breakage of the PEO chains by a series of UV initiated free radical reactions. When the free radicals induce the degradation of PEO segments in PCE, the photodegradation of PCE mainly occurs in PEO segments. |
| 语种 | 英语 |
| WOS记录号 | WOS:000083427000021 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/75381]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Bei, JZ |
| 作者单位 | Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bei, JZ,He, WS,Hu, XZ,et al. Photodegradation behavior and mechanism of polycaprolactone-poly(ethylene oxide) block copolymer[J]. ACTA POLYMERICA SINICA,1999(5):627-630. |
| APA | Bei, JZ,He, WS,Hu, XZ,&Wang, SG.(1999).Photodegradation behavior and mechanism of polycaprolactone-poly(ethylene oxide) block copolymer.ACTA POLYMERICA SINICA(5),627-630. |
| MLA | Bei, JZ,et al."Photodegradation behavior and mechanism of polycaprolactone-poly(ethylene oxide) block copolymer".ACTA POLYMERICA SINICA .5(1999):627-630. |
入库方式： OAI收割
来源：化学研究所
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