期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2013
卷号：4
期号：6
页码：828-831
出版社：University of Mohammed Premier Oujda
摘要：The synthesis of high-molecular-weight lactic acid based polymers by chain extension polymerization was investigated. A hydroxyl termi nated telechelic prepolymer was synthesized and then it was chain extended to the high molecular weight polymer. All polymerizations were carried out in the melt, using tin octoate as catalyst. The products were characterized by titrametric methods, Dynamic mechanical analysis (DMA), FTIR and Visco metry. An increase in the molecular weight as well as storage modulus along with glass transition temperature (Tg) was observed
