1 School of Environment and Materials, Ministry of Engineering, University of Polytechnic Shanghai, Shanghai 201209, China; 2 Shanghai Re-mall Environmental New Material Co., Ltd., Shanghai 201209, China
Abstract: High impact polystyrene (HIPS) plays an important role in the field of polymer plastics due to its excellent mechanical properties. In a few years, its output has been directly equal to that of ABS (acrylonitrile-butadiene-styrene copolymer) polymer resin.As a kind of excellent polymer resin material, HIPS has shown great advantages in engineering(especially in electrical and computer) material field: good dimensional stability; strong heat resistance, good impact toughness; easy processing, and can be processed into various functional materials by adding appropriate fillers. However, the development of science and technology innovation ushered in the rapid development of electronic products. The waste of plastic materials caused the loss of polymer resources and the damage to the natural environment. Therefore, the recycling technology of waste plastics including waste hips has developed rapidly, and the high value reuse of waste hips has also promoted the development of recycled plastics industry. In this paper, the research progress of high-value reuse of waste HIPS at home and abroad is reviewed. The melt blending modification, industrial recycling and incineration pyrolysis recovery of waste HIPS are discussed from the point of view of material and energy regeneration. Among them, melt blending modification is the mainway to realize recycling of waste HIPS resin in China. According to the different blending modification process, it can be divided into physical recycling and physicochemical recycling. According to the different types of blends, it has been initially clear that rubber elastomers, organic materials and inorganic nanomaterials have better single or synergistic modification effect on waste HIPS resin. Generally speaking, the high value reuse of waste HIPS has brought enormous economic and environmental benefits, and plays an active role in promoting the recycling of waste plastics.
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