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• W2040313819 startingPage "1058" @default.
• W2040313819 abstract "Abstract BACKGROUND: Poly(lactic acid) (PLA) has received much attention as a biodegradable polymer. But the physical properties of PLA, such as brittleness, limit its wider applicability. Copolymerization polymers ing soft blocks provides a useful method to improve the mechanical properties of PLA. RESULTS: Poly(lactic acid)‐ block ‐(polycarbonate diol) (PLA‐PCD) copolymers were synthesized using a two‐step process with polycondensation and chain extension reactions. The effect of polycarbonate diol content on the prepolymer properties was studied. The chain‐extended products were characterized using 1 H NMR, F and. The effect of the NCO/OH ratio on the properties of the chain‐extended products, including the mechanical properties and thermal properties, was studied. eight‐average molecular weight of the product can reach 210 000 g mol −1 when the molar ratio of NCO to OH is 3:1. CONCLUSION: The PLA‐PCD copolymers obtained can crystallize, and the crystallinity decreases with chain‐extension reaction. The products exhibit superior mechanical properties with elongation at break above 230%, which is much higher than that of PLA chain‐extended products. The products have a good potential for packaging applications. Copyright © 2009 Society of Chemical Industry" @default.
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• W2040313819 date "2009-08-03" @default.
• W2040313819 modified "2023-10-12" @default.
• W2040313819 title "Synthesis and characterization of poly(lactic acid) and aliphatic polycarbonate copolymers" @default.
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• W2040313819 doi "https://doi.org/10.1002/pi.2633" @default.
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