Study on Mechanical and Biodegradation Performance of PLA/E-MA-GMA/PBS Composites

LIU Zhi-gang, YAN Xiang-yu, CHEN Bo, XIAO Yang, LI Jun-wen, ZHOU Wei-hua, WU Li-da

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (04) : 99-103. DOI: 10.15925/j.cnki.issn1005-3360.2024.04.020
Biological and Degradable Material

Study on Mechanical and Biodegradation Performance of PLA/E-MA-GMA/PBS Composites

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Abstract

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 E­MA­GMA content on the thermal properties, rheological properties, flowability, mechanical properties, phase morphology, and biological decomposition properties were studied. The results show that when the E­MA­GMA content is 5%~25%, the biological decomposition rate of PLA/E­MA­GMA/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/E­MA­GMA/PBS composites, and further shows that there is partial compatibility between PLA/E­MA­GMA/PBS composites. With the increase of E­MA­GMA content, the complex viscosity of the PLA/E­MA­GMA/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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Polylactic acid / Ethylene-methyl acrylate-glycidyl methacrylate / Polybutylene succinate / Mechanical properties / Biodegradation performance

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LIU Zhi-gang , YAN Xiang-yu , CHEN Bo , et al . Study on Mechanical and Biodegradation Performance of PLA/E-MA-GMA/PBS Composites. Plastics Science and Technology. 2024, 52(04): 99-103 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.04.020

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