Normal and low temperature impact resistant polylactic acid material and preparation method thereof

The invention discloses a polylactic acid material resistant to normal and low temperature impact and a preparation method thereof, the polylactic acid material is prepared from polylactic acid resin, a flexibilizer, an antioxidant and a nucleating agent, and the flexibilizer is a mixture of hydrogenated styrene-butadiene-styrene, an ethylene-butyl acrylate copolymer and high-density polyethylene. The polylactic acid material resistant to normal and low temperature impact is biodegradable and also has good normal and low temperature impact performance, and the normal and low temperature impact performance is obviously improved. The preparation method has low requirements on equipment, the process is simpler, the used equipment is common polymer processing equipment, the additional cost is not increased, and industrial production is facilitated. 本发明公开了一种耐常低温冲击的聚乳酸材料及其制备方法，所述聚乳酸材料由聚乳酸树脂、增韧剂、抗氧剂、成核剂制备而成，所述增韧剂为氢化苯乙烯-丁二稀-苯乙烯、乙烯丙烯酸丁酯共聚物和高密度聚乙烯的混合物。本发明的耐常低温冲击的聚乳酸材料在生物可降解的同时，还拥有较好的常低温冲击性能，且常低温冲击性能得到明显提高。其制备方法，对设备要求不高