Abstract
Plant-based biodegradable polylactic acid (PLA) polymers have limited applications, such as in the production of disposable products using the extrusion method. This restricted usability is due to their low glass transition temperature and poor low-temperature molding properties. In the present study, we investigated the changes in PLA polymer properties induced by bioadditives and optimized the conditions of extrusion molding to commercialize biodegradable polymers using an injection molding process. Compared to pure PLA, the constructed PLA composite with nanosilica showed a 15% reduction in melt flow; however, the tensile strength increased by 13%, flexural strength increased by 15.9%, impact strength improved by 18.2%, and hardness increased by 40%, enabling injection molding even at temperatures of 180-190 °C. The mold flow of the nanocomposite and optimization analysis of product injection molding were conducted using a runner and fingate.
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