ICCAS OpenIR
Photodegradation behavior and mechanism of polycaprolactone-poly(ethylene oxide) block copolymer
Bei, JZ; He, WS; Hu, XZ; Wang, SG
1999-10-01
Source PublicationACTA POLYMERICA SINICA
ISSN1000-3304
Issue5Pages:627-630
AbstractThe 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.
KeywordPhotodegradation Polycaprolactone-poly(Ethylene Oxide) Block Copolymer Photodegradation Mechanism
Indexed BySCI
Language英语
WOS IDWOS:000083427000021
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/75382
Collection中国科学院化学研究所
Corresponding AuthorBei, JZ
AffiliationChinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
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.
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