期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 28, 期 4, 页码 437-442出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200600715
关键词
microwave-assisted polycondensation; polycondensation; polyesters; poly(lactic acid)
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 SnCl2/P-TsOH, PLA with a M, 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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