The research aims to develop new polymer composites using Polyalthia longifolia seeds (PLS) particulates-loaded epoxy composites through open layup molding technique with different wt.% of PLS fillers (PLSF) (10, 20, 30,40, and 50 wt. %). As per ASTM standards, the composite specimens were fabricated and carried out the tensile strength, compressive strength, flexural strength, and Shore D hardness. Among the different weight percentages of composites, the 30 wt. % of PLSF-loaded epoxy composites exhibited the maximum tensile strength of 18.5 ± 0.5 MPa, compressive strength of 22.5 MPa, the flexural strength of 22 MPa, and Shore D hardness of 92 ± 0.5 SHN. The strength of the 30 wt. of PLSF-loaded epoxy composites was further enhanced by incorporating single layer of 400 GSM E-glass fiber on both sides of the composites and attained the maximum strength of 26.5 ± 0.5 MPa. The PLSF-loaded epoxy composite specimen was carried out the Fourier transform infrared spectroscopy (FTIR) and found the presence of different functional groups. The surface morphology and elemental compositions of 30 wt. % PLSF-loaded epoxy composite was found through filed emission electron microscope (FESEM) and energy dispersive X-ray spectroscopy (EDX). The average length of fillers was found as 2.25 ± µm through FESEM. The newly developed PLSF-loaded and E-glass fiber-reinforced epoxy sandwich composites would be used where the strength is less significant.
This work aims to incorporate lignocellulosic coconut coir (CC) fillers into the HDPE matrix for domestic cloth clip product development where the strength is less significant. The structural, mechanical, and thermal properties of HDPE composites with varying weight fractions of CC fillers (10, 20 wt%) were investigated. The die for product development was designed through Pro-E software and manufactured with relevant machining processes. The composites were fabricated through the injection molding technique as per ASTM standards.Using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis, the microstructure and various proportions of elements present in the composites were investigated. The presence of different functional groups and their vibrations were identified through the Fourier-transform infrared spectroscopy (FTIR) technique. The experimental mechanical results reveal the positive effect of CC fillers in the HDPE matrix, and the results were a maximum of 20 wt% CC filler incorporation. The filler reinforcement has little effect on the thermal degradation behavior since the step of deterioration is not changed appreciably. Nevertheless, the initial degradation temperature was affected by the presence of CC fillers. Depolymerization and dehydration of diverse ingredients correspond to different endothermic peaks in the DSC curve. Based on the characterization results, the 20 wt% CC filled-loaded partial eco-composite was selected for cloth clip product development.
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