Abstract: The ternary blends of polylactic acid, poly (methyl methacrylatebutadienestyrene), and glycerol monostearate were prepared by meltblended method and blown films were prepared. Poly (methyl methacrylatebutadienestyrene) was used as toughener and glycerol monostearate as plasticizer. The crystallization morphology, mechanical properties, optical properties of the PLA/MBS/GMS films were studied. The results show that the addition of MBS can improve the mechanical properties of polylactic acid/poly(methyl methacrylatebutadienestyrene)/glycerol monostearate films and promote the crystallization properties of polylactic acid.

Key words: polylactic acid, poly(methyl methacrylatebutadienestyrene), glycerol monostearate, toughening, plasticizing, blown film