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International Journal of Polymer Science
Volume 2009, Article ID 929732, 7 pages
Research Article

Synthesis of Poly(L-lactide) via Solvothermal Method

1School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai 200240, China
2School of Pharmacy, Howard University, 2300 4th Street, NW, Washington, DC 20059, USA

Received 9 June 2009; Accepted 25 August 2009

Academic Editor: Yulin Deng

Copyright © 2009 Ling Fang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Poly(L-lactide) was obtained from the ring-opening polymerization of L-lactide through a solvothermal process. Tin (II) chloride () was used as the catalyst for the polymerization reaction. The focus of this paper was on the effect of solvents, catalyst usage, temperature, time, and antioxidants on the ring-opening reaction in the solvothermal synthesis. Ubbelohde viscometer, FTIR, GPC, and DSC were used to characterize the products. It is found that the optimal reaction condition for the highest molecular weight of PLA is at for 10 hour with 0.4% SnC in 10 mL toluene as solvent, and the high crystallinity can be obtained. The addition of antioxidant prior to the polymerization is conducive to obtaining high molecular weight and augment , and values of PLA.