Mechanical properties of reinforced polyvinyl chloride composites: Effect of filler form and content

Abstract

In this study, to understand how cellulosic materials characteristics influence the mechanical properties of polyvinyl chloride (PVC) composites, we first studied the effect of different types (wood flour and pulp fiber) and contents on selected mechanical properties of uncompatibilized wood plastic composites. We then compared the properties of hybrid composites to those of composites reinforced with wood flour or fiber, individually. PVC as polymer matrix and cellulosic materials were compounded by twin-screw extrusion and test specimens were prepared by injection molding. All tested properties vary significantly with filler form or content. With the addition of wood flour, the tensile strength moderately increases, but with the addition of hybrid filler and pulp fiber, it increases significantly. Notched impact strength increased with increasing particle size. Pulp fiber resulted in higher strength at the 40 wt % level compared with the strength properties of wood flour composites. The higher aspect ratio of the fiber had significant effect on the mechanical properties. Increasing filler load improves the strength of the composite up to a load of 40 wt %, further increase in the filler loading (>40 wt %) results in a decrease in properties, due to the to filler agglomerates. Incorporation of 25% weight fraction of wood pulp fiber in hybrid composites gave the highest values of composite properties. The mechanical properties of hybrid composites are found to be much higher than that composites filled with wood flour. Finally, results showed that the hybrid composites had the maximum improvement in selected mechanical properties.

A comparative analysis of woven jute/glass hybrid polymer composite with and without reinforcing of fly ash particles

“…Further, it has also been observed from the plot that due to addition of fly ash filler, the strength of the composite increases up to 5% and beyond that strength is decreasing, this is due to the wettability problem between the matrix and the reinforcement.Where as in jute fiber composites the strength continuously increasing as the filler percentage increases up to 15 wt% and in GJJG composites the strength increases up to 10 wt%, this is due to the absorption ability of the jute fibers. This type of behavior is observed by the Mohanty et al in case of nanofiller addition and Ashori et al in case of polyvinyl chloride composites.…”

Interfacial compatibility of wood flour/polypropylene composites by stress relaxation method

“…As a result, structure of wood four/PP composites becomes more compact with wood content increasing. With further increases in the wood flour content, the nucleating effect of wood flour which agglomerates easily and the appearing voids cause poor interfacial adhesion and incompact structure between wood flour and PP 1, 2, 30…”

Resistance of Conifer Needle Polyolefin Composites (CNPCs) Against Biodecomposition Caused by Fungi

“…As it is known from the literature, the use of a large proportion by weight of the plant filler involves a significant deterioration of mechanical properties of the material [30,31]. Therefore, in the first step we present micrographs of the sample surfaces that were taken to assess superficial changes in the sample materials.…”