Mechanical, thermal, and water uptake characteristics of woodflour-filled polyvinyl chloride/acrylonitrile butadiene styrene blends

摘要

Woodflour-filled composites based on polymeric blends of polyvinyl chloride (PVC) and super high-impact grade ABS were developed. Mechanical, thermal, and water uptake characteristics of the PVC/ABS matrix and their wood composites were evaluated. In the case of PVC/ABS matrix, the blend at a mass ratio of 50/50 rendered the impact strength with a very high value of up to 65 kJ/m ~2, noticeably higher than those of the parent resins, that is, 6 kJ/m ~2 of PVC and 35 kJ/m ~2 of ABS. Dynamic mechanical analysis thermograms showed two distinct glass transition temperatures (T _gs) that shifted toward each other indicating partial miscibility of the blends. Water absorption of the blends after 24 h immersion was low, that is, within the range of 0.04-0.2 wt % and exhibits a behavior closed to pseudo-Fickian type. The obtained PVC/ABS wood composites exhibited an increase of flexural modulus as well as T _gs with an increase of woodflour content. Finally, impact strength of the PVC/ABS composites was significantly higher than those of PVC composites or polyethylene composites comparing at the same woodflour content.