The morphological effects upon enzymatic degradation of poly(butylene succinate-co-butylene terephthalate)s (PBST)

被引：66

作者：

Li, Faxue ^{[1
]}

Xu, Xinjian ^{[1
]}

Yu, Jianyong ^{[1
]}

Cao, Amin ^{[1
]}

机构：

[1] Donghua Univ, Coll Text, Shanghai 200051, Peoples R China

来源：

POLYMER DEGRADATION AND STABILITY | 2007年 / 92卷 / 06期

关键词：

poly(butylene succinate-co-butylene terephthalate)s; enzymatic degradation; lipase; morphology;

D O I：

10.1016/j.polymdegradstab.2007.02.008

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In this work, the enzymatic degradation of poly(butylene succinate-co-butylene terephthalate) (PBST) copolyesters was studied using the lipase from Pseudomonas (Lipase PS (R)). The biodegradation behavior was found to strongly depend on the overall impacts of several important factors as the BT comonomer structure and molar content, thermal characteristics, morphology, the enzyme-substrate, and so forth. Further, the biodegraded residual film samples were allowed to be analyzed by means of gel permeation chromatography (GPC), proton nuclear magnetic resonance (H-1 NMR), differential scanning calorimeter (DSC), small angle X-ray scattering (SAXS), and scanning electron microscope (SEM). On the experimental evidences, an exo-type mechanism of enzymatic chain hydrolysis preferentially occurring in the amorphous region was suggested for the PBST film samples. (c) 2007 Published by Elsevier Ltd.

引用

页码：1053 / 1060

页数：8

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