Preparation method of maleic anhydride grafted chlorinated polyvinyl chloride composite material

Abstract

The invention relates to a modified technique of chlorinated polyvinyl chloride (CPVC) composite material, in particular to a preparation method for producing maleic anhydride grafted chlorinated polyvinyl chloride (MAH-g-CPVC) composite material by adopting a melting method to graft the maleic anhydride (MAH) onto a CPVC molecular link. The thermal decomposition temperature is 15 to 20 DEG C higher than that of ordinary CPVC resin, so that a melting processing temperature condition is satisfied, the Vicat softening temperature of the material can reach 125 to 135 DEG C, the maximal application temperature can reach 120 DEG C, and the long-term application temperature of the material is 105 DEG C. The defects that the melting temperature of the CPVC is close to or exceeds the thermal decomposition temperature, the overheating decomposition is likely to occur in the process for machining and forming a product, the machining difficulty is large, the fragileness of the product is large, and the impact resistance is poor can be overcome, so that the application prospect of the CPVC is wider.

Description

technical field [0001] The invention relates to a modification technology of chlorinated polyvinyl chloride (CPVC) composite material, in particular to a method for preparing maleic anhydride grafted chlorinated polyvinyl chloride (MAH-g-CPVC) composite material by melting method Methods. Background technique [0002] Chlorinated polyvinyl chloride (CPVC) plastics have excellent physical and chemical properties such as heat resistance, weather resistance, chemical medium corrosion resistance, colorless, tasteless, odorless and flame-retardant self-extinguishing properties. It is a fast-growing application field in recent years. The novel plastic material has great market potential. Chlorinated polyvinyl chloride (CPVC) materials can be made into pipes, profiles, plates, rods and other products through molding and processing, and are mainly used in chemical industry, electrical industry, interior decoration industry, petroleum industry, construction industry and other fi...

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Problems solved by technology

However, the melting temperature of CPVC resin is close to or exceeds its thermal decomposition temperature, and it is easy to cause overheating and decomposition during the process of forming products, which makes the processing difficult, and the products are brittle and have poor impact resistance, which makes the chlorinated polyvinyl chloride (CPVC) material. Applications are very limited

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