Thermoplastic biodegradable plastic and preparation method thereof

The invention relates to the technical field of degradable plastics, and in particular, relates to a thermoplastic biodegradable plastic and a preparation method thereof. The thermoplastic biodegradable plastic comprises the following raw materials in parts by mass: 20-40 parts of starch, 20-60 parts of poly(butylene adipate-co-terephthalate), 60-100 parts of epoxypropane, 30-50 parts of dichloromethane, 30-50 parts of hydrochloric acid, 30-50 parts of a methanol solution, 1-10 parts of maleic anhydride, 10-20 parts of calcium carbonate, 5-15 parts of a cross-linking agent and 1-10 parts of a catalyst. The raw materials have good compatibility, and the plastic has good biodegradability, good thermoplasticity, high mechanical strength, simple production and low production cost, and has positive significance for environmental protection and actual production application. 本发明涉及可降解塑料技术领域，具体涉及一种热塑性生物降解塑料及其制备方法，包括以下质量份数的原料淀粉20～40份、聚己二酸对苯二甲酸丁二醇酯20～60份、环氧丙烷60～100份、二氯甲烷30～50份、盐酸30～50份、甲醇溶液30～50份、马来酸酐1～10份、碳酸钙10～20份、交联