采用溶液缩聚法直接合成聚乳酸,主要探索了溶剂的种类对聚乳酸分子量的影响.确定了最佳工艺条件,即辛酸亚锡作为催化剂,用量为0.8%,甲苯:乳酸=2∶1,聚合温度170 ℃,常压反应24 h.
In this paper, direct synthesis of polylactic acid through solution polycondensation was studied, and the influence of solvents on molecular weight of polylactic acid was explored. The optimum factor were as follows:with 0.8% catalyst Sn (Oct)2 at 170 ℃ and toluene as solvent( toluene: LA = 2:1 ) for 24 h.