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Home > Vol 17, No 4 (Oct.–Dec. 2024): Special Issue > Prasoetsopha

Effects of Modified Silicon Carbide on The Physical Properties of Bioplastic Blends

Natkrita Prasoetsopha, Patcharapon Somdee, Manjunath Shettar, Manauwar Ali Ansari, Pranee Chumsamrong

Abstract


The study’s goal is to improve the physical properties of biodegradable plastics by mixing poly(lactic acid) (PLA), polybutylene succinate (PBS), and silicon carbide (SiC) to make composites that could be used as filaments for 3D printing. Polymer blends and composites were fabricated using an internal mixer. The fraction of SiC was varied from 10 to 40 phr and filled in PLA/PBS blends with a retained ratio of 80/20 wt.%. Then, the mechanical properties, thermal properties, melt flow rate and morphology of PLA/PBS/SiC composites were investigated. Field emission scanning electron microscope images present a uniform dispersion of silane-treated SiC particles throughout the PLA/PBS matrix. The morphology showed better adhesion between PLA/PBS and treated SiC particles. Therefore, this was also the reason for the improvement of Young’s modulus and impact strength when the SiC fraction was increased, which were improved by 33% and 104%, respectively, compared to neat PLA. Furthermore, the melt flow rate increased with an increasing SiC fraction. This might be because adding SiC reduces the viscosity of the composites, which affects the molecular chain movement of the PLA/PBS and the crystallinity of PLA, therefore decreasing the ΔHm of PLA and Xc,PLA. However, Tg and Tm of PLA and PBS remained relatively stable with an increasing fraction of SiC particles.

Keywords



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DOI: 10.14416/j.asep.2024.07.015

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