Authors: Yu.E. Poharukova, V.T. Novikov, V.N. Glotova

Title of the article: Polycondensation of lactic acid to oligomers in the solution

Year: 2017, Issue: 1, Pages: 134-138

Branch of knowledge: Chemical technology

Index UDK: 54-126, 547-32

DOI: -

Abstract: The analysis of existing methods of producing the lactide was done. Different options of performing the stages of concentration and polycondensation of lactic acid solution in the process of the lactide preparation were studied. The changes in the content of lactic acid during the polycondensation of the oligomer and molecular weight over time were calculated. It was proved that the use of azeotropic water distillation allowed us to reduce the process time of lactic acid concentration and polycondensation.

Key words: biodegradable polymers lactic acid concentration oligomer lactide

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