Polymerization of ε-Captolactone and Lactide with Rare Earth Acetylacetonates

Chinese Journal of Applied Chemistry ›› 1995, Vol. 0 ›› Issue (6): 59-61.

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Polymerization of ε-Captolactone and Lactide with Rare Earth Acetylacetonates

Liu Jianfei, Shen Zhiquan, Sun Junquan

Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027

Received:1994-12-27 Revised:1995-05-03 Published:1995-12-10 Online:1995-12-10

Abstract

Abstract: It is found that rare earth acetylacetonates can initiate the ring-opening polymer-ization of ε-caprolactone and lactide.The effects of temperature solvent,polymerizationtime,rare earth element and ligand were studied.The results showed that rare earth acety-lacetonates,particularly Y(acac)₃,were good catalysts for the polymerization of ε-caprolac-tone and lactide, Crystalline polycaprolactone with viscosity-average molecular weight of 1.4×10⁵ could be obtained at 80℃ in quantitative yield.

Key words: ε-caprolactone, lactide, rare earth acetylacetonate, ring-opening polymerization

Liu Jianfei, Shen Zhiquan, Sun Junquan. Polymerization of ε-Captolactone and Lactide with Rare Earth Acetylacetonates[J]. Chinese Journal of Applied Chemistry, 1995, 0(6): 59-61.

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Polymerization of ε-Captolactone and Lactide with Rare Earth Acetylacetonates

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