Degradable composite material and preparation method thereof

The invention discloses a degradable composite material and a preparation method thereof, and belongs to the technical field of polymer processing and modification. The degradable composite material comprises the following components in parts by weight: 50-90 parts of polylactic acid A, 0.1-10 parts of polylactic acid B (the polylactic acid A and the polylactic acid B are optical isomers), 1-20 parts of a degradable polyester C, 1-50 parts of a polylactic acid B-degradable polyester C copolymer and 0.1-5 parts of a functional additive. The degradable composite material disclosed by the invention not only has excellent toughness, but also has excellent heat resistance, is completely biodegradable, and can be widely applied to the fields of plastic structural parts, plastic packages, automotive upholstery, medical consumables and the like. 本发明公开了一种可降解复合材料及其制备方法，属于聚合物加工与改性技术领域。本发明所述材料包括聚乳酸A 50～90份，聚乳酸B 0.1～10份(聚乳酸A与聚乳酸B为旋光异构体)，可降解聚酯C 1～20份，聚乳酸B-可降解聚酯C共聚物1～50份，功能性助剂0.1～5份。本发明的复合材料不仅具有优异的韧性，还具有优异的耐热性，并且是完全可生物降解的，可