@inproceedings{81215a4e06e64de58231177b0a216177,
title = "Effect dehydrants to increasing molecular weight of condensed polylactic acid",
abstract = "The polylactic acid (PLA) was prepared by direct melt polycondensation using lactic acid aqueous solution as raw material. Considering of the difficulty to rule out small molecules of water, magnesium or magnesium methoxide which could react with water were used as dehydrant and added in the PLA polycondensation, respectively. The determination of moisture, GPC and DSC results showed that both the magnesium and magnesium methoxide are effective in dehydration, the molecular weight of final products PLA is significantly improved and the latter is better. Both of them have a good promoting effect on polycondensation reaction to get a higher molecular weight polylactic acid products. For the time of adding magnesium and magnesium methoxide, it is better to add in the late stage of polycondensation reaction rather than early stage. Furthermore, magnesium has a smaller influence on crystallization of PLA, whereas the crystallinity of PLA is greatly reduced after adding magnesium methoxide.",
keywords = "Dehydrant, Direct melt polycondensation, Magnesium, Magnesium methoxide, Polylactic acid",
author = "Yin, {Meng Yan} and Yang, {Rong Jie} and Li, {Ding Hua}",
year = "2014",
doi = "10.4028/www.scientific.net/AMM.456.525",
language = "English",
isbn = "9783037859285",
series = "Applied Mechanics and Materials",
publisher = "Trans Tech Publications Ltd.",
pages = "525--528",
booktitle = "Research in Mechanical Engineering and Material Science",
address = "Switzerland",
note = "2013 International Conference on Mechanical, Material Engineering, MME 2013 ; Conference date: 23-11-2013 Through 24-11-2013",
}