Co-catalysis compatibilization modified polystyrene alloy material and preparation method thereof

Abstract

The invention discloses a co-catalysis compatibilization modified polystyrene alloy material and a preparation method thereof. The preparation method comprises the following steps of: mixing raw materials of polystyrene, an ethylene-octylene copolymer, a co-catalysis system, an antioxidant and a lubricating agent in proportion and stirring evenly for about 5-10 min by using a stirring machine; placing into a double-screw extruder for melt extrusion, wherein the temperature of a feed cylinder is 150-170 DEG C in a feeding region, 165-185 DEG C in a melting region and 170-190 DEG C in a reaction region, the die orifice temperature is 160-180 DEG C, the handpiece pressure is 3-6 Mpa, and the screw speed is 60-90 rpm; and extruding the material, cooling and granulating to prepare a product of cylindrical particles with colors from light green, dark green to dark brown according to different proportions. The alloy material has simple preparation method, low cost, excellent comprehensive performance and wide market prospect, and can be applied to some industrial occasions through wholly or partly replacing the modified polystyrene.

Description

technical field [0001] The invention relates to a processing or batching process of polymer materials, in particular to a co-catalyzed compatibilization-modified polystyrene alloy material and a preparation method thereof. Background technique [0002] Polystyrene has the advantages of transparency, good formability, high rigidity, excellent chemical properties and electrical insulation, low moisture absorption and low price. It is widely used in packaging, construction, automobiles, home appliances, daily necessities and toys. One of the four general-purpose plastics today. However, due to its inevitable shortcomings, such as poor toughness, resistance to environmental stress cracking and solvents, and relatively low heat distortion temperature (70-98°C), polystyrene has been limited in engineering applications. In order to change its shortcomings such as brittleness and low impact strength, many polystyrenes are modified to broaden their application fields. Throughout th...

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Problems solved by technology

However, the direct addition of pre-prepared block and graft copolymers as compatibilizers has some disadvantages: (1) Most block copolymers are in a microphase-separated state at the blending temperature and have high viscosity, It is difficult to fully disperse at the two-phase interface, so it is not conducive to blending processing; (2) The added block copolymer is likely to be dispersed in the homogeneous phase in the form of microcapsules, rather than at the phase interface, so it cannot play a role. To reduce interfacial tension, improve interfacial cohesion, and improve the compatibility of incompatible blend systems; (3) Compatibilizers of block and graft copolymers are expensive and used in large amounts, which is not conducive to reduce manufacturing cost

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