Studies on degradation behaviour of poly (ethyleneglycol)-b-poly (butylene terephthalate) copolymers

被引：0

作者：

Zhang, AY ^{[1
]}

Feng, ZG ^{[1
]}

Zhang, Y ^{[1
]}

Ba, JH ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Chem Engn & Mat Sci, Beijing 100081, Peoples R China

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2003年 / 24卷 / 06期

关键词：

PEG-b-PBT block copolymer; degradation behavior; swelling ratio; inherent viscosity;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The degradation behavior of the copolymers are investigated by immersing the copolymer film into PBS (pH=7.4) at 37 degreesC in a shaking bath. The influence of the copolymer composition on physical properties, including the swelling ratio, the weight loss, the inherent viscosity, the surface morphology of polymer films, as well as the,degree of crystallization is discussed. The experimental results reveal that the degradable profiles can be controlled by changing the copolymer composition. It is shown that the intial degradation of copolymer comes from the cleavage of the ester bonds between hydrophilic PEG and hydrophobic PBT.

引用

页码：1122 / 1125

页数：4