Tougheningeffectofpoly(D-lactide)-b-poly(butylenesuccinate)-b-poly (D-lactide) copolymersonpoly(L-lactic acid)bysolution casting method

YanlongLiu a,b, JunShao c, JingruSun a, XinchaoBian a,b, ZhimingChen b, GaoLi a, XuesiChen a,b,nMaterials Letters155(2015)94–96YanlongLiu a,b, JunShao c, JingruSun a, XinchaoBian a,b, ZhimingChen b, GaoLi a, XuesiChen a,b,n

The blockcopolymersofpoly(D-lactide)-b-poly(butylenesuccinate)-b-poly(D-lactide) (PDLA-b-PBS-b- PDLA) wereaddedintoPLLAmatrixtoenhancethetoughnessofPLLAbysolutioncastingmethod.The properties ofthe films wereinvestigatedbywideangleX-raydiffractometry(WAXD),differential scanning calorimetry(DSC)andtensiletesting.TheWAXDandDSCresultsshowedthatthe stereocomplexwasthemajorcrystallinewhentheamountofcopolymeradditionexceeded30wt%. The blendingsampleswithhighmechanicalstrengthandtoughnesscouldbeobtainedonlywhen certain amountofPDLA-b-PBS-b-PDLA copolymerswereadded.