Method for preparing polylactic acid composite material through tung oil-based polyol reactive blending and prepared polylactic acid composite material

The invention belongs to the technical field of high polymer materials, and particularly relates to a method for preparing a polylactic acid composite material through tung oil-based polyol reactive blending and the prepared polylactic acid composite material. Through reactive blending, the polylactic acid/tung oil-based polyurethane composite material with good toughness is prepared. The high reaction activity of isocyanate is utilized to react with tung oil-based polyol, tung oil-based polyurethane is generated in situ in the blending process, and meanwhile, grafted or segmented copolymer and a cross-linked structure are formed with polylactic acid, so that the compatibility of the two phases is improved. According to the invention, more naturally sourced bio-based materials are used, so that the blend has better biodegradability and biocompatibility, and effective regulation and control of the mechanical properties of the PLA blend are realized through different preparation modes and adjustment of the func