Polylactic acid (PLA) and tapioca starch biocomposites offer a sustainable alternative to petroleum-based plastics for single-use packaging. This study focused on optimizing injection molding parameters for a novel PLA/tapioca starch blend using response surface methodology (RSM). Injection temperature had the most significant impact on tensile strength. The optimal parameters identified were injection temperature of 181 degrees C, pressure of 40 MPa, and speed of 300 mm/s, achieving a tensile strength of 25.34 MPa without defects. Morphological analysis revealed smoother fracture surfaces and presence of microfibrils denoting increased ductility. Mechanical properties, including 16 % elongation, 24.5 MPa flexural strength, and 9.32 kJ/m2 impact strength, were comparable to conventional plastics. Enhanced biodegradation in ambient soil conditions was observed, while migration tests showed no leaching in most stimulants, supporting its potential for sustainable packaging applications.

来源平台：MATERIALS TODAY COMMUNICATIONS