Mechanical Properties of Poly(lactic acid)/Starch Composites Compatibilized by Maleic Anhydride

摘要

Blending poly(lactic acid)(PL A)with wheat starch compatibized by maleic anhydride(MA)was performed with a lab-scale co-extruder.An initiator,2,5-bis(tert-butylperoxy)-2,5 dimethylhexane(LI01),was used to improve compatability among PLA,starch and MA.Interfacial adhesion between PLA and starch was significantly improved.Mechanical properties increased markedly compared to the virgin composites of PLA/starch.The PLA/starch composites at a constant ratio of 55/45 compatibilized by 1% MA and initiated by 10% LI01(MA basis)resulted in the highest tensile strength and elongation.