High molecular weight poly(l-lactic acid)s by polyesterification using diisopropylcarbodiimide (DIPC) and 4-(dimethylamino) pyridinium-p-toluene sulfonate (DPTS)

被引：0
作者：
S. Shyamroy
B. Garnaik
S. Sivaram
机构：
[1] CSIR-National Chemical Laboratory,Polymer Science and Engineering Division
来源：
Polymer Bulletin | 2015年 / 72卷
关键词：
PLLA; DMAP; PTSA; Diisopropylcarbodiimide; High Molecular Weight Poly;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
High molecular weight poly(l-lactic acid) has been prepared from the corresponding functionally terminated oligomers employing a polyesterification method at room temperature using diisopropylcarbodiimide and 4-(dimethylamino) pyridinium-p-toluene sulfonate. Self-condensation of hydroxyl and carboxylic acid-terminated poly(l-lactic acid) oligomers (Mn: ~1,000) resulted in polymers with high molecular weights (Mn > 45,000) under mild conditions. End-group analysis by MALDI-TOF provided evidence for N-acylurea formation in the product under the reaction conditions employed.
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页码：405 / 415
页数：10
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