JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Print ISSN : 0021-9592
General Research and Others
The Effect of the Impurities in Refinery Process from Fermentation Broth on Lactic Acid Polymerization
Feerzet AchmadKeisuke YamanishiZhi Yuan LiuTakao Kokugan
Author information
JOURNALS RESTRICTED ACCESS

2009 Volume 42 Issue 8 Pages 632-635

Details
Abstract

Polylactic acid (PLA) is synthesized by direct polycondensation without catalyst (NC-DP) method using a lactic acid (HLa) solution which had been refined by concentration, esterification and hydrolysis of fermented broth from fresh cassava roots (FCR). Higher polymerization rates and earlier thermal degradation had been observed, compared with those from a pure lactic acid solution. It is due to residual impurities in refining process, such as butanol (BuOH) and butyl lactate (BuLa), which act as an external catalyst. Additionally, it has been found that thermal degradation of PLA containing these impurities occurs via random scission with vinyl end groups, in regard to specific scission for PLA from a pure HLa solution.

Information related to the author
© 2009 The Society of Chemical Engineers, Japan
Previous article
feedback
Top