Politejsav szintézis: a tejsav termikus és mikrohullámú gerjeztéssel történo direkt polikondenzációja és a két módszer összehasonlítása

Translated title of the contribution: Synthesis of polylactic acid: Direct polycondensation of lactic acid by thermal way and microwave irradiation and comparison of the two methods

Bodnár Ildikó, Borda Jeno, Kéki Sándor, Deák György, Zsuga Miklós

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Abstract

The melt polycondensation of D,L-lactic acid was studied by 1H-NMR and MALDI-TOF MS method at temperatures ranging from 100°C to 220°C. At low temperature, i.e., up to 120°C linear, and at higher temperature both linear and cyclic oligomers were formed. It was shown that the synthesis of linear polylactic acid can effectively be achieved and the reaction time can considerably be shortened upon microwave irradiation. The molecular mass range of linear polylactic acid obtained is 500-1000 g/mole by MALDI MS. It was also shown that MALDI MS is capable of detecting both linear and cyclic polylactic acids.

Original languageHungarian
Pages (from-to)341-348
Number of pages8
JournalMuanyag Es Gumi/Plastics and Rubber
Volume39
Issue number10
Publication statusPublished - Oct 1 2002

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ASJC Scopus subject areas

  • Polymers and Plastics

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