Effects of impact modifiers on the properties of rigid PVC/wood-fiber composites

This study examined the effects of impact modifier types and addition level s on the mechanical properties of rigid PVC/wood-fiber composites. The impa ct resistance of rigid PVC/wood-fiber composites depends strongly on the ty pe and content of impact modifier. With the proper choice of modifier type and concentration, the impact strength of rigid PVC/wood-fiber composites c an be significantly improved without degrading the tensile properties. Meth acrylate-butadiene-styrene and all-acrylic modifiers performed in a similar manner and were more effective and efficient in improving the impact resis tance of rigid PVC/wood-fiber composites than the chlorinated polyethylene modifier.