Impact-resistant polystyrene composition and its preparation method

Abstract

The invention provides a novle impact polystyrene compound, which is prepared through polymerization by using phenylethene containing small grain- size powder. Said small grain- size powder is cross-linking powder rubber with its grain size being 20- 500 nm, the gel content is no less than 60wt%, and swelling index is no more than 15. The compatability between rubber particle and polyphenylacetylene is increased, and the dispersing condition of rubber particle in polyphenylacetylene is improved. So the flexibility of polyphenylacetylene compound is dramatically improved even the rubber particle content is very low, and the strength, rigidity and other mechanical performance are still maintained.

Description

technical field [0001] The invention relates to an impact-resistant polystyrene composition and a preparation method thereof, more specifically, the invention relates to an ultrafine powder rubber toughened polystyrene resin and a preparation method thereof. Background technique [0002] Polystyrene (PS) has a wide range of applications in various fields of industry and civil use because of its abundant raw materials, cheap price, easy molding process, low hygroscopicity and good transparency. It is a general-purpose plastic with a large amount of consumption. However, the intrinsic structure of polystyrene resin determines its lack of mechanical properties, such as insufficient strength, poor toughness, etc., especially brittle behavior due to its molecular chain internal structure. This largely limits its scope of application. [0003] In order to improve the toughness of polystyrene, the method of polymerization or blending is often used to incorporate toughening compone...

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