Preparation and Properties of Tuff Stone Powder/PVC Stone-Plastic Composites
To solve the high-value resource utilization of tuff stone powder,the main compositions and the effects of surface treatment on the chemical compositions and particle size distributions of tuff stone powder were investigated.Then the tuff stone powder/polyvinyl chloride(PVC)composites were prepared by the melt blending,and the effects of different surface treatments on the morphologies and mechanical properties of tuff stone powder/PVC composites were explored.On these basis,the pilot production of tuff stone powder/PVC stone-plastic floor material was carried out.The results show that the tuff stone powder is mainly composed of SiO2.The aggregations of tuff stone powder could be relieved after the surface treatments.Surface treatments could significantly improve the mechanical properties of tuff stone powder/PVC composite materials.With the same filler mass fraction(62%),the stearic acid surface-modified tuff stone powder/PVC composite has better mechanical properties,thermal aging resistance and flame retardancy than the CaCO3/PVC composite.Its tensile strength,Shore A hardness and limit oxygen index could respectively reach(26.52±1.7)MPa、90.2±0.9、63.1%±1.5%.The performances of the prepared tuff stone powder/PVC stone-plastic floor material fully meet the requirements of national standards,and this material has excellent performances in locking tension and surface scratch resistance.This work plays a certain demonstration role for the comprehensive utilizations of dust and stone powder resources.
万方数据
维普
