High molecular weight polylactic acids by polyesterification using diisopropylcarbodiimide (DIPC) and 4-(dimethylamino) pyridinium ptoluene sulfonate (DPTS)

TitleHigh molecular weight polylactic acids by polyesterification using diisopropylcarbodiimide (DIPC) and 4-(dimethylamino) pyridinium ptoluene sulfonate (DPTS)
Publication TypeJournal Article
Year of Publication2015
AuthorsShyamroy, S, Garnaik, B, Sivaram, S
JournalPolymer Bulletin
Volume72
Issue3
Pagination405-415
Date PublishedMAR
ISSN0170-0839
Abstract

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 (M (n) : similar to 1,000) resulted in polymers with high molecular weights (M (n) > 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.

DOI10.1007/s00289-014-1285-0
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)1.371
Divison category: 
Polymer Science & Engineering