A kind of preparation method of heat-resistant, corrosion-resistant high molecular weight polyarylene sulfide sulfone

Abstract

The invention discloses a preparation method of novel heat-resisting and corrosion-resisting polyarylene sulfide sulfone with high molecular weight and relates to the field of high molecular materials. The preparation method takes sodium sulfide and 4,4'-dichlorodiphenylsulfone as raw materials, lithium chloride and sodium acetate as catalysts, N-methyl pyrrolidone as a solvent and sodium hydroxide as an auxiliary agent; a specific process flow for producing the novel heat-resisting and corrosion-resisting polyarylene sulfide sulfone successively comprises the following steps: pre-polymerizing, preparing a 4,4'-dichlorodiphenylsulfone solution, re-polymerizing and separating out, washing, filtering, drying and packaging and the like to prepare a polyarylene sulfide sulfone product. According to the preparation method, a relatively high polymerization temperature can be obtained under low pressure through adopting a manner of pre-polymerizing and re-polymerizing; a low-pressure polymerization method is adopted and the dangerousness of operation is reduced; meanwhile, the production cost is greatly reduced; the lithium chloride and the sodium acetate are used as the catalysts, so that the synthesis period of polyarylene sulfide sulfone resin is shortened and the energy consumption is reduced; furthermore, the polyarylene sulfide sulfone resin is subjected to separation treatment by adopting water; the separation cost is low, the effect is good and particles of a product are more uniform.

Description

technical field [0001] The invention relates to the field of polymer materials, and more specifically relates to a preparation method of heat-resistant and corrosion-resistant high-molecular weight polyarylene sulfide sulfone. Background technique [0002] In recent years, engineering plastics have been widely used in the automotive industry, electronic appliances, machinery, military industry and other fields. Engineering plastics has become the fastest-growing field in the plastics industry in the world today, and its development plays a supporting role in the country's pillar industries and modern high-tech industries. Polyarylene sulfide sulfone (PPS) is a special engineering plastic with excellent comprehensive properties. It has high mechanical strength, high temperature resistance and high flame retardancy. Excellent electrical properties, strong corrosion resistance and other characteristics. But there are also some disadvantages: few varieties, few high-functional...

AI Technical Summary

Problems solved by technology

But there are also some disadvantages: few varieties, few high-functional products, hard and brittle, almost no solvent soluble below 200 °C

[0009] At present, although domestic research on PASS materials has entered the international advanced level, the synthesis of high-performance PASS resins still needs to be deepened, especially in terms of industrialization.

For example, in the process of large-scale industrial production of PASS, there will be problems such as detonation, low product yield, low molecular weight, unstable performance, and high production cost. Therefore, there is no large-scale industrial production of PASS resin in China.

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