High-impact-resistance polystyrene polymer and preparation method thereof

Abstract

The invention discloses a high-impact-resistance polystyrene polymer, which comprises the following components in percentage by weight: 80-82.5 percent of polystyrene, 10 percent of ethylbenzene, 7 percent of rubber, 0.5-3 percent of POSS and 300ppm of an initiator. A preparation method of the high-impact-resistance polystyrene polymer comprises the following steps of: (1) mixing high-cisform polybutadiene rubber with polystyrene; (2) adding an octavinyl-POSS monomer and ethylbenzene serving as a solvent into a mixture obtained in the step (1); (3) adding a difunctional initiator into the mixture obtained in the step (2); (4) performing a pre-polymerization reaction; (5) performing a final polymerization reaction; (6) devolatilizing; and (7) recovering devolatilized ethylbenzene and polystyrene. After POSS is added, the impact resistance physical property and tensile property of the polystyrene polymer are improved, and the thermal decomposition temperature and glass transition temperature are raised remarkably; and moreover, the method can be used for condensing and recovering unreacted polystyrene and ethylbenzene serving as a solvent, has a reasonable process, and can be used for fully utilizing raw materials.

Description

technical field [0001] The invention relates to the technical field of material chemical industry, in particular to a polystyrene polymer with high impact-resistant mechanical properties enhanced by POSS and a preparation method thereof. Background technique [0002] Polystyrene has been produced since 1930. Polystyrene was one of the first thermoplastic polymers to be produced industrially. In order to meet the toughness requirements of the material, rubber-modified polystyrene was developed in 1950, that is, high-impact polystyrene (HIPS). By adding rubber to the polystyrene substrate, it can produce different Performance of various grades of high impact polystyrene. [0003] The outstanding characteristics of high-impact polystyrene are easy processing, excellent dimensional stability, high impact strength and high rigidity. However, high-impact polystyrene (HIPS) has certain deficiencies in terms of heat resistance, oxygen permeability, UV stability and oil resistance...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by this invention is: provide a kind of high impact polystyrene polymer; Another object of the present invention is to provide the preparation method of described high impact polystyrene polymer, can increase production cost At the same time, improve the mechanical properties of high impact resistance of polystyrene polymers, and at the same time solve the problem of poor heat resistance

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