Study on Mechanical and Biodegradation Performance of PLA/E-MA-GMA/PBS Composites
The purpose of this paper is to improve the toughness of polylactic acid(PLA)through the method of blending modification to obtain impact resistant biodegradable materials.PLA/EMA-GMA/PBS composites were prepared by adding ethylene-methyl acrylate-glycidyl methacrylate copolymer(EMA-GMA)and polybutylene succinate(PBS)to PLA by the method of blending and melting reaction processing.The influences of different E-MA-GMA content on the thermal properties,rheological properties,flowability,mechanical properties,phase morphology,and biological decomposition properties were studied.The results show that when the E-MA-GMA content is 5%～25%,the biological decomposition rate of PLA/E-MA-GMA/PBS composites is larger than 60%,which meets the requirements of biodegradable plastics in GB/T 19277.1-2011.E-MA-GMA can significantly improve the toughness and impact strength of PLA/E-MA-GMA/PBS composites,and further shows that there is partial compatibility between PLA/E-MA-GMA/PBS composites.With the increase of E-MA-GMA content,the complex viscosity of the PLA/E-MA-GMA/PBS composites increases remarkedly,the molecular chain entanglement of different components.There is a significant interaction between E-MA-GMA,PLA,and PBS.
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