Photodegradation behavior and mechanism of block copoly(caprolactone-ethylene glycol)

被引：29

作者：

Bei, JZ ^{[1
]}

He, WS ^{[1
]}

Hu, XZ ^{[1
]}

Wang, SG ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China

来源：

POLYMER DEGRADATION AND STABILITY | 2000年 / 67卷 / 02期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/S0141-3910(99)00139-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The photodegradation behavior of polycaprolactone-poly(ethylene glycol) block copolymer (PCE) was characterized by determining the change of mechanical properties, inherent viscosity and GPC chromatogram of PCE samples which were exposed to UV light. It was observed that the photodegradation rate of the PCE increased with increasing poly(ethylene glycol) content in the copolymer. The results indicated that the pure poly(ethylene glycol) (PEO) can not be photodegraded alone, but the carbonyl groups in PCL segment catalyze the breakage of PEO chains by a series of UV initiated free radical reactions. A mechanism for the photodegradation of PEO chains was proposed which accounts for the carbonyl group formation observed in the pure PEG. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：375 / 380

页数：6

共 16 条

[1] Bei JZ, 1997, POLYM ADVAN TECHNOL, V8, P693, DOI 10.1002/(SICI)1099-1581(199711)8:11<693::AID-PAT702>3.0.CO
[2] 2-B
[3] BEI JZ, IN PRESS ACTA POLYM
[4] POLY(ESTER-ETHER-ESTER) BLOCK-COPOLYMERS AS BIOMATERIALS
CERRAI, P
GUERRA, GD
LELLI, L
TRICOLI, M
DELGUERRA, RS
CASCONE, MG
GIUSTI, P
[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE, 1994, 5 (01) : 33 - 39
[5] THE BIODEGRADATION OF POLY(ESTER-ETHER-ESTER) BLOCK-COPOLYMERS IN A CELLULAR ENVIRONMENT IN-VITRO
DELGUERRA, RS
CRISTALLINI, C
RIZZI, N
BARSACCHI, R
GUERRA, GD
TRICOLI, M
CERRAI, P
[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE, 1994, 5 (12) : 891 - 895
[6] Dunn Richard L., 1995, P17
[7] GILBERT RD, 1982, DEV POLYM DEGRADATIO, V4, P259
[8] Li S., 1995, DEGRADABLE POLYM PRI, P43, DOI 10.1007/978-94-011-0571-2_4
[9] LIS M, 1998, J APPL POLYM SCI, V68, P989
[10] LUCKI J, 1981, EUR POLYM J, P17

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