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Highly biodegradable copolymers composed of chiral depsipeptide and L-lactide units with favorable physical properties by Hiroyuki Shirahama; Akira Tanaka; Hajime Yasuda is a Materials Science article available to read on EtoBox.

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## Abstract Syntheses of copolymers composed of optically active depsipeptides (3,6‐dimethyl‐2,5‐morphorinedione) and L‐lactide—poly(L‐3,L‐6‐dimethyl‐2,5‐morphorinedione‐__co__‐L‐lactide), poly(L‐3,DL‐6‐dimethyl‐2,5‐morphorinedione‐__co__‐L‐lactide), and poly(L‐3,D‐6‐dimethyl‐2,5‐morphorinedione‐__co__‐L‐lactide)—were examined in an effort to improve the biodegradability and physical properties of homopoly(L‐lactide). In degradation tests, the copolymers composed of 3,6‐dimethyl‐2,5‐morphorinedione and lactide in the ratios 10/90 to 13/87 exhibited high biodegradability toward proteinase K, whereas a homopolymer, poly(L‐lactide), exhibited very poor biodegradability (only 50% after 200 h). These polymers composed of 3,6‐dimethyl‐2,5‐morphorinedione/L‐lactide in 11/89 to 13/87 ratios also degrades rapidly after being in compost for 30 days. The resulting copolymers, however, showed relatively low elongation properties. Therefore, ternary copolymerizations of L‐3,DL‐6‐dimethyl‐2,5‐morphorinedione, ε‐caprolactone, and L‐lactide were explored in an effort to improve their mechanical properties, especially the elongation, and sufficient results were obtained with an approximate ratio of

Who reads Highly biodegradable copolymers composed of chiral depsipeptide and L-lactide units with favorable physical properties?

Author

Hiroyuki Shirahama; Akira Tanaka; Hajime Yasuda

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

2001

Language

EN

Field

Materials Science (Physical Sciences)