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- W2364956607 abstract "The hydroxyl-terminated modified poly(lactic acid-co-e-caprolactone) copolymers(PLCA) were synthesized via directly melt polycondensation with lactic acid(D,L-LA) and e-caprolactone(e-CL) as raw material using linear heating method.The best synthesis conditions were pressure 0.098 MPa,catalyst dosage 0.8%(mass fraction),n(D,L-LA)∶n(e-CL)=8∶2,polymerization temperature of 170℃ and polymerization time 7h.The copolymers were characterized by viscosity-average molecular weight,FT-IR,1H-NMR,DSC,TGA and XRD.The results demonstrate that the biggest viscosity average molecular weight of PLCA is 20785,Tg of PLCA is lower than PLA,and with the e-CL content increased,the Tg is smaller,which improved the brittleness of PLA effectively.the crystallinity of PLCA is lower than PLA,it indicates that the flexibility increases because of the addition of e-CL." @default.
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- W2364956607 date "2011-01-01" @default.
- W2364956607 modified "2023-09-23" @default.
- W2364956607 title "Synthesis and Characterization of Hydroxyl-terminated Poly(lactic acid-co-ε-caprolactone )" @default.
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