桥联双金属稀土配合物对丙交酯的催化聚合研究

Study on Lactide Polymerization by A Bimetallic Lanthanide Complex Bridged With A Dialkyloxo Ligand

本文研究了桥联双金属稀土配合物「（ＡｒＯ）２（ｄｍｅ）Ｓｍ」２「μ－η＾４－（ＰｈＮ）ＯＣＣＯ（ＮＰｈ）（其中ＡｒＯ＝２，６－二叔丁基－４－甲基酚基）对丙交酯的催化聚合性能，讨论了催化剂用量、聚合时间、聚合温度及单体浓度的影响，还探讨了聚合反应机理。实验表明，聚合物粘均分子量可达１０．０×１０＾４以上。

This paper presents the polym erization of lactide by a bim etallic lan thanide com plex of [( Ar O)2 ( D M E) Sm ]2 [(μ η4 ( Ph N) O C C O( N Ph)]( Ar O= 2,6 di tert butyl 4 m ethyphenoxo) and the effects ofcatalystconcentraction, polym erization tim e, tem perature and m onom er concentraction. The polym erization m echanism is also discussed. Based on experim ents the m olecular w eightofpolym ers can reach 10.0×104.