Biodegradable material poly(lactic acid-glycolic acid)(PLGA50) was directly synthesized respectively using D,L-lactic acid (D,L-LA)and L-lactic acid (L-LA)as raw materials, by melt copolycondensation with glycolic acid (GA)[n(GA):n(LA)=1:1]. The relative molecular weight, structure and properties etc. of PLGA50 weresystematically characterized by intrinsic viscosity, GPC, FTIR, 1H NMR, DSC, X-ray diffraction and contact angle testing etc.. Both L-PLGA50 and D,L-PLGA50 are amorphous polymer. But under sa...
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