Effect of Agro Waste Particles on the Mechanical Properties of Hybrid Unsaturated Polyester Resin Matrix Composites

Abstract

The efficacy of reinforcement of polyester resin matrix composites with agro waste particles to effect improvement on the disadvantage of low mechanical properties for optimal performance was studied. 5-25 wt. % of coconut shell, periwinkle shell, and cow bone particles were applied in reinforcing unsaturated polyester resin matrix by mould casting and the microstructural and mechanical characteristics of the composites were evaluated. There was uniform distribution of the agro waste particles in the polymer composites matrix from the scanning electron microscopy (SEM) result. The hybrid composite at 15 wt. % reinforcement demonstrated the highest mechanical properties in terms of ultimate tensile strength (66.73 MPa), flexural strength (76.76 MPa), hardness (87.76 BHN), and impact energy (23.16 J). This shows the efficacy of hybridisation and the high potential of the composite for wider applications.

Tensile, Flexural and Hardness Properties of Guava Leaves (<i>Psidil guajava</i>) Extract Modified Coconut (<i>Cocos nucifera</i>) Shell Powder-Polymethyl Methacrylate Base Denture Composites

“…Coconut shell powder (CSP) has been served as a reinforcement for different polymers due to its inherent qualities such as high strength and modulus as well as other mechanical properties [22 -24]. This is attributed to load bearing capacity, waxy nature of CSP, and uniform distribution of CSP in matrix like high density polyethylene, epoxy and polyester resins [25][26][27][28]. Aside poor impact, wear and abrasion, heat and chemical resistance of PMMA, and hydrophobic nature of filler due to high lignncelullose content causes moisture absorption, thereby, increases thickness, dimensional instability and weak interfacial bonding between the filler and matrix [29].…”