A High Efficiency PDMS-Based Stabilizer for Dispersion Polymerization of L-lactide in Supercritical Carbon Dioxide

作者：Zhan, Shi-Ping^*; Huang, Xing; Zhao, Qi-Cheng; Chen, Li; Hou, Wei-Min; Zhang, Song; Deng, Jin-Jun

来源：Journal of Macromolecular Science, Part A: Pure and Applied Chemistry , 2013, 50(10): 1070-1074.

DOI：10.1080/10601325.2013.821916

• supercritical carbon dioxide
• Biodegradable polymers
• stabilizer
• dispersion polymerization
• L-lactide

Dispersion polymerization of lactides and lactones has been studied and has received a great deal of attention used to prepare biodegradable polymers in supercritical carbon dioxide (ScCO2). The triblock copolymers of poly(epsilon-caprolactone) PCL-polydimethylsiloxane (PDMS)-poly(epsilon-caprolactone) PCL by the feed ratio of 1:2:1 and 1:3:1, respectively were synthesized to be used as the stabilizers in the dispersion polymerization of L-lactide. The fine poly(L-lactide) (PLLA) powders were obtained at the concentrations of 3% to 5%w/w (stabilizer/monomer). The results demonstrated that the triblock copolymers were the effective stabilizers for the dispersion polymerization of L-lactide. It was also found that the cooling process had a significant effect on the particle size of the fine powders. In order to obtain the best PLLA powders, it would be necessary to use the cooling process with stirring.

• 出版日期2013-1-1
• 单位大连大学; 大连理工大学; 大庆师范学院