Preparation and Study of 5VA Environmentally Friendly Flame-Retardant PP Composites
A 5VA environmentally friendly flame retardant polypropylene(PP)composites was prepared using a twin-screw extrusion mechanism.The effects of flame retardant addition,flame retardant surface treatment,and twin-screw thread combination on the flame retardancy,physical and mechanical properties,and production status of PP composites were studied.The results show that when the flame retardant content is 33%,the flame retardancy of PP composites reaches 5VA level,but it significantly reduces the tensile strength,elongation at break,impact strength,and melt flow rate.Silane coupling agents,titanate coupling agents,and silane wax treated flame retardants have improved the toughness and flowability of 5VA environmentally friendly flame retardant PP composites,with the best effect of silicone wax.In scaled up production,SK deep thread components are added to the cutting end of the thread combination to compact the material,and internal mixing and SME components are added to reduce shear and promote dispersion,effectively solving the problems of foaming and difficult pulling of 5VA grade flame-retardant PP composites that prevent normal production.
万方数据
维普
