Optimization of process parameters of microwave processed PLLA/coir composites for enhanced mechanical behavior

Abstract

In the present work, poly-L-lactide (PLLA)/coir-based polymer composites were fabricated by a novel manufacturing route of microwave processing. Microwave processing is faster and cleaner process as compare to conventional manufacturing processes. The effect of microwave temperature, time and fibre weight reinforcement was evaluated for their mechanical behaviour using uniaxial tension and flexural tests. The full factorial design was used to optimize the process parameters for enhanced mechanical performance of the composites. The analysis of results was done on Design Expert V.10 software. PLLA/coir composite processed at 140 C for 12 min having fibre weight percentage of 30% has maximum tensile strength of 18 MPa. The maximum flexural strength 48 MPa reported was for the same specimen having maximum tensile strength. The optimized value of process parameters obtained was, processing temperature: 140C, time 12 min and coir reinforcement percentage of 30%. The fractured specimens were characterised using scanning electron microscopy to support the results.