PRACTICAL ASPECTS OF POLYMERIZATION OF D,L-LACTIDE INITIATED WITH TETRAPHENYLTIN

被引：6
|
作者：
MEHTA, S
RAGHUVANSHI, RS
MISRA, A
GANGA, S
TALWAR, GP
机构：
[1] National Institute of Immunology, New Delhi, 110067, Aruna Asaf Ali Marg
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 1995年 / 58卷 / 09期
关键词：
D O I：
10.1002/app.1995.070580911
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Melt polymerization conditions for D,L-Lactide initiated with tetraphenyltin were studied with regard to polymer molecular weight. The combined effect of time and temperature on polymer molecular weight and degree of conversion of D,L-Lactide is described. Polymerization at constant initiator concentrations resulted in a narrow scattering of reproducible molecular weight values. The presence of air/moisture and other impurities during the melt polymerization most likely have a deterimental effect on molecular weight. After a short induction period the rather slow polymerization of D,L-Lactide resulted in a maximal molecular weight followed by an almost constant value of molecular weight. (C) 1995 John Wiley & Sons, Inc.
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收藏
页码：1495 / 1499
页数：5
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