以双(烷氧-亚胺芳氧)基钛(Ⅳ)配合物为催化剂,催化D,L-丙交酯开环聚合合成Ti-P聚乳酸材料,为分析材料的微观结构和性能,采用IR、1HNMR、13C NMR、TG/DSC、拉伸/压缩以及扫描电镜等方法,对聚乳酸材料进行表征及测试.实验结果表明:该钛(Ⅳ)配合物催化D,L-丙交酯的加成反应不是随机加成聚合,存在中等程度的等规加成立构选择性,并能明显阻止分子内的酯交换,对D,L-丙交酯显示出可控开环聚合的特征；与Sn-P聚乳酸相比,采用具有烷氧-亚胺芳氧基大体积空间位阻的钛(Ⅳ)配合物为催化剂,可得窄分散度、规整度好的Ti-P聚乳酸,并能提高其热稳定性、抗拉伸和压缩的力学性能.
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