An investigation of the effect of silane water-crosslinking on the properties of poly(L-lactide)

被引：25
|
作者：
Han, Changyu [1 ]
Bian, Junjia [1 ]
Liu, Hao [1 ]
Han, Lijing [1 ]
Wang, Shusheng [1 ]
Dong, Lisong [1 ]
Chen, Shan [2 ]
机构：
[1] Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
[2] NE Normal Univ, Coll Life, Changchun 130024, Peoples R China
来源：
POLYMER INTERNATIONAL | 2010年 / 59卷 / 05期
基金：
美国国家科学基金会;
关键词：
poly(L-lactide); crosslinking; hydrolytic resistance; biodegradation; MECHANICAL-PROPERTIES; ENZYMATIC DEGRADATION; MOLECULAR-WEIGHT; RADIATION; POLY(EPSILON-CAPROLACTONE); COMPOSITES; HYDROLYSIS; POLYMERS; ACID); BIODEGRADABILITY;
D O I：
10.1002/pi.2760
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A silane-grafting water-crosslinking approach was developed to crosslink poly(L-lactide) (PLLA) by grafting vinylalkoxysilane onto PLLA using dicumyl peroxide, followed by silane hydrolysis to form siloxane linkages between PLLA chains. The degree of silane grafting onto PLLA was qualitatively characterized using Fourier transform infrared spectroscopy and quantitatively determined using inductively coupled plasma mass spectrometry. Cross linked PLLA films were obtained by curing of silane-grafted PLLA in hot water. Gel fractions were evaluated in order to calculate the crosslinking reaction kinetics and crosslinking density. Various techniques were used to investigate the effect of silane water-crosslinking on the thermomechanical properties, hydrolysis resistance and biodegradation of PLLA. In addition to an improvement in thermal stability and mechanical properties, hydrolysis resistance was significantly enhanced as a result of silane water-crosslinking of PLLA. Moreover, the biodegradation of silane water-crosslinked PLLA was retarded compared with neat PLLA. (C) 2010 Society of Chemical Industry
引用
收藏
页码：695 / 703
页数：9
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