【作者】 张淑贞； 李复生； 魏东炜；

【Author】 ZHANG Shuzhen LI Fusheng WEI Dongwei (R & D Center for Petrochemical Technology,Tianjin University,Tianjin 300072)

【机构】 天津大学石油化工技术开发中心；

【摘要】 可再生资源、可生物降解绿色高分子材料聚乳酸(PLA)应用前景广阔。从聚合设备、聚合条件以及聚合材质3个方面着重总结了丙交酯开环聚合工艺,产品中低分子杂质的脱除是高聚物生产工艺难点,分析了再沉淀、溶剂萃取、真空熔融及无催化反应等脱挥方法,重点推荐了 Hitomi Ohara 脱挥工艺流程。更多还原

【Abstract】 Poly(lactic acid)(PLA)is a renewable,biodegradable,green high-polymer material,which has a good prospect.In the paper,the research on the ring-opening polymerization process of lactide is reviewed,mainly in terms of polymerization reactor,reacting condition and equipment construction materials.The polymer devolatilization is a difficulty step in the polymerization process,so the devolatilization methods including the reprecipitation,extrac- tion,vacuum melting,and reaction without catalysts are systematically introduced,then the Hitomi Ohara devolatiliza- tion process is mainly recommend.更多还原