Biodegradable material based on PLA/PPC and preparation method thereof

The invention discloses a biodegradable material based on PLA (polylactic acid)/PPC (polypropylene carbonate) and a preparation method of the biodegradable material, and relates to a biodegradable material and a preparation method of the biodegradable material. The toughness and the thermal stability of the material are further improved and the rigidity, the processing fluidity and the optical performance of the material are well maintained by utilizing the high reaction activity of the epoxy functional group after ring opening; dried polylactic acid (PLA), polypropylene carbonate (PPC) and epoxidized soybean oil (ESO) are subjected to a melting reaction through a twin-screw extruder, strong intermolecular force formed between PLA and PPC is increased, compatibility between PLA and PPC is fully improved, and the obtained blend has excellent impact strength, elongation at break and thermal stability compared with a pure PLA/PPC system; meanwhile, the method is high in process operability and easy for industria