摘要
以稀土配位化合物Ln(CF3 COO) 3 /Al(i -Bu) 3 ,(Ln =Y ,Yb ,Tm ,Ho等 )为催化剂进行了丙交酯的开环聚合 ,研究了影响丙交酯聚合及聚合物分子量的一些因素 ,得到了对于丙交酯制备、开环聚合及聚合物分子质量控制很有价值的结论。
The d,l lactide is prepared from d,l lactic acid and the factors affecting the preparation are discussed.Poly( d,l lactide)(PLA) is synthesized by ring opening polymerization of d,l lactide with rare earth coordination composed of lanthanide trifluoroacetate Ln(CF 3COO) 3(Ln=Y,Yb,Tm,Ho) and triisobutylaluminum Al( i Bu) 3 as catalyst.This paper discusses the factors affecting the PLA polymerization and its molecular weight,and gives useful results about the preparation and polymerization of d,l lactide,and the control of the PLA molecular weight.
基金
国家自然科学基金!( 9772 0 13)
关键词
丙交酯
开环聚合
制备
生物降解材料
聚丙交酯
d,l-lactide,ring-opening polymerization,rare earth coordination catalyst biodegradable polymers
