Flame retardant for polylactic acid and preparation method thereof

The invention relates to the technical field of a novel material, in particular to a flame retardant for polylactic acid. The flame retardant is prepared from the following raw materials including starch, maleic anhydride, 1-allyl-3-methymidazole chloride, ammonium polyphosphate and melamine cyanurate. In the preparation process of the flame retardant, the starch powder ester is used as a carbon source; the ammonium polyphosphate is used as an acid source; melamine cyanurate is used as an air source; the high-flame-retardant expansion type flame retardant is prepared; the prepared flame retardant is subjected to polymerization and compounding with polylactic acid; the flame retardant effect of the polylactic acid is improved; the defect of great fusion drip of the polylactic acid composite material during the combustion can be effectively overcome; the flame retardant effect of the polylactic acid is improved. 本发明涉及新材料技术领域，特别涉及种聚乳酸用阻燃剂；由以下原料组成：淀粉、马来酸酐、1-烯丙基-3-甲基咪唑氯盐、聚磷酸铵、三聚氰胺氰尿酸盐；本发明在阻燃剂的制备中，通过淀粉粉酯为碳源，聚磷酸铵为酸源