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- W2356953485 abstract "The synthesis of polylactides by direct condensation polymerization catalyzed by rare-earth oxide was studied.The results showed rare-earth oxide had better effect on the synthesis,and was easy to separate from synthetic product.The catalytic effect of Y_2O_3 was better than that of other rare-earth oxide.The optimum reaction conditions were that the content of the catalyst was 0.174wt% of that of lactic acid,prepolymerization for 5 h under 2 000 Pa,at 120℃,then polymerization for 30 h under 1 000 Pa at 140℃.The viscosity average molecular weight of poly(lactic acid) was 8.57×10~3 g/mol." @default.
- W2356953485 created "2016-06-24" @default.
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- W2356953485 date "2006-01-01" @default.
- W2356953485 modified "2023-09-25" @default.
- W2356953485 title "Synthesis of Polylactides by Direct Condensation Polymerization Catalyzed by Rare-earth Oxide" @default.
- W2356953485 hasPublicationYear "2006" @default.
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