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- W2094364963 abstract "High purity in high yield L-lactide was prepared using a new purification method, and poly-L-lactide (PLLA) with ultra-high weight average molecular mass and narrow polydispersity index was synthesized by ring-opening polymerization. The effects of the purification method on the purity and yield of L-lactide were investigated, and the influences of initiator concentration, polymerization temperature and polymerization time on the weight average molecular mass of PLLA were also studied. A synthetic purification method involving a water bath and two times recrystallization could improve the purity of L-lactide to 100%. The yield of L-lactide reached 40.6% and increased 12.1% compared with the recrystallization method. Poly-L-lactide with a weight average molecular mass of about 102.4 × 104 and a polydispersity index of 1.16 was obtained when polymerization was conducted with molar ratio of monomer to initiator ([M]/[I]) of 12000 for 24 h at 140°C." @default.
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- W2094364963 date "2008-03-12" @default.
- W2094364963 modified "2023-10-17" @default.
- W2094364963 title "Synthesis of Ultra-high Weight Average Molecular Mass of Poly-L-lactide" @default.
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- W2094364963 doi "https://doi.org/10.1080/00914030701816110" @default.
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