Fly Ash-Linear Low Density Polyethylene Composites for Rotational Molding: Morphological and Thermal Analysis
Authors :- Yadav J.; Ramkumar P.L.; Parwani A.K.
Publication :- Journal of Materials Engineering and Performance, (Springer), 2024
Rotational molding is an ideal method for producing hollow, stress-free plastic products with minimal waste. Linear low-density polyethylene (LLDPE) is frequently used as a base resin because of its advantageous properties; however, its low strength limits its application in critical areas. To overcome this limitation, the present study investigates the use of fly ash (FA) as a reinforcement with LLDPE, to explore its effects on processing characteristics, thermal properties, and morphology. The melt flow index decreases as FA content increases, with a maximum reduction of 35.7% observed for 40% weight content of FA. An appreciable increase in temperature decomposition range 396.6–502.3 °C of composite has been observed through the thermogravimetric analysis. Furthermore, a slower degradation rate was observed in the presence of FA reinforcement in the LLDPE matrix. Differential scanning calorimetry data indicated a reduction in melting enthalpy and changes in crystallization kinetics with the inclusion of FA. Additionally, SEM analysis showed that beyond 20% FA in the composite, increased agglomeration led to large cavities, indicating insufficient matrix coverage and challenges in achieving proper product formation. Overall, FA content ranges from 0 to 20% with LLDPE appearing suitable for further mechanical study, offering valuable insights for engineering applications of FA/LLDPE composites.