The present invention relates to a method for improving the heat resistance of a high-toughness polylactic acid composite material based on a multifunctional crosslinked polylactic acid interface layer. The improvement of toughness and heat resistance of the polylactic acid material is realized by constructing a multifunctional crosslinked polylactic acid interface layer, specifically as follows: S1: drying the raw material polylactic acid (PLA) and the toughening agent methyl methacrylate-butadiene-styrene copolymer (MBS); S2: weighing the dried raw material PLA and toughening agent MBS, placing both in a high-speed mixer for blending to obtain a blend; feeding the blend into a twin-screw extruder for compounding, extrusion and granulation, and drying to obtain pellets; S3: feeding the obtained pellets into an injection molding machine for injection molding to obtain standard specimens of the MBS/PLA composite material with 5–15% MBS content; S4: placing the specimens in a crosslinking solution for reaction, taking out the specimens after the reaction, cleaning, and then storing. In this method, a multifunctional crosslinked polylactic acid interface layer is formed on the surface of the composite material through a crosslinking reaction, thereby improving the toughness and heat resistance of the polylactic acid material.
Country Code: CN
Application Number: CN202410546262.1
