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Various concentrations of inorganic particles of volcanic ashes (VA) were added using twin screw extruder and the injection molding machines to the poly(vinyl chloride) (PVC) to fabricate PVC/VA composites. The effect of volcanic ash particles weight content (0, 5, 10, 15, 20, and 25 wt.%) on the mechanical properties of PVC/VA composites was investigated by tensile and flexural tests. Tensile and flexural properties of composite samples were determined under three different temperatures (-10 degrees C, 20 degrees C and 50 degrees C) by using Shimadzu AG-X test machine, having a load cell of 10 kN and equipped with the thermostatic chamber with controlled temperature environment. As a result, mechanical properties of PVC/VA composites showed that VA can be used as a filler material in PVC composites. Results of both, the tensile and the flexural tests showed that at -10 degrees C and at 20 degrees C, flexural and tensile strength values of 25 wt.% PVC/VA composites have decreased by nearly 15%, compared to value of pure PVC. Even though VA particles decrease the flexural and tensile strength of PVC, VA can be used as a filler material in PVC matrix. Morphologies of the fracture surfaces and the dispersion of VA particles were observed by using scanning electron microscopy (SEM).

Evaluation of Volcanic Ash Concentration Effect on Mechanical Properties of Poly(Vinyl Chloride) Composites