Ring-Opening Polymerization of Lactide by (ArO)2Sm(THF)4(ArO=2, 6-ditertbutyl-4-methylphenoxo-)

Chinese Journal of Applied Chemistry ›› 1998, Vol. 0 ›› Issue (1): 62-64.

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Ring-Opening Polymerization of Lactide by (ArO)₂Sm(THF)₄(ArO=2, 6-ditertbutyl-4-methylphenoxo-)

Yao Yingming¹, Shen Qi¹, Hu Jingyu²

1. School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006;
2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun

Received:1997-03-04 Revised:1997-09-04 Published:1998-02-10 Online:1998-02-10

Abstract

Abstract: 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.

Key words: lactide, ring-opening polymerization, divalent lanthanide complex

Yao Yingming, Shen Qi, Hu Jingyu. Ring-Opening Polymerization of Lactide by (ArO)₂Sm(THF)₄(ArO=2, 6-ditertbutyl-4-methylphenoxo-)[J]. Chinese Journal of Applied Chemistry, 1998, 0(1): 62-64.

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Ring-Opening Polymerization of Lactide by (ArO)₂Sm(THF)₄(ArO=2, 6-ditertbutyl-4-methylphenoxo-)

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