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Microwave-Assisted Single-Step Synthesis of Poly(lactic acid) by Direct Polycondensation of Lactic Acid

✍ Scribed by Ritsuko Nagahata; Daisuke Sano; Hidematsu Suzuki; Kazuhiko Takeuchi

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
217 KB
Volume
28
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

The microwave‐assisted direct polycondensation of LA to synthesize PLA has been studied. Microwave irradiation strikingly accelerates the polymerization rate of LA compared to conventional heating. By use of a binary catalyst of SnCl~2~/p‐TsOH, PLA with a $\overline M _{\rm w}$ of 16 000 is obtained within 30 min under a reduced pressure of around 30 mmHg. MALDI‐TOF MS measurements reveal that the PLA formed is mainly composed of linear polymer and macrocyclics.

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