摘要
Ring-opening polymerization of D,L-lactide has been successfully carried out by(ArO)2Sm (THF)4 (ArO = 2, 6-ditertbutyl(4-methylphenoxo-) as catalyst for the first time.The catalyst contentration, monomer concentration and solvent showed a marked effect onthe polymerization. The polymerization rate decrease with increase of monomer concentra-tion and decrease of catalyst concentration. The initiation mechanism has been discussed ac-cording to the results of end-group analysis of oligomer by IR. The active species are sup-posed to be a samarium enolate formed from the reaction of (ArO)2Sm(THF)4 with lactide.
Ring-opening polymerization of D,L-lactide has been successfully carried out by(ArO)2Sm (THF)4 (ArO = 2, 6-ditertbutyl(4-methylphenoxo-) as catalyst for the first time.The catalyst contentration, monomer concentration and solvent showed a marked effect onthe polymerization. The polymerization rate decrease with increase of monomer concentra-tion and decrease of catalyst concentration. The initiation mechanism has been discussed ac-cording to the results of end-group analysis of oligomer by IR. The active species are sup-posed to be a samarium enolate formed from the reaction of (ArO)2Sm(THF)4 with lactide.
出处
《应用化学》
CAS
CSCD
北大核心
1998年第1期62-64,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
江苏省自然科学基金
中国科学院上海有机化学研究所金属有机开放实验室资助
关键词
钐
聚丙交酯
聚合
催化剂
丙交酯
开环聚合
lactide,ring-opening polymerization,divalent lanthanide complex
