Method of preparing polyphenylene sulfide with synthesis mother solution

Abstract

The invention discloses a method of preparing polyphenylene sulfide with a synthesis mother solution and relates to the field of high polymer materials. Sodium sulfide and p-dichlorobenzene are taken as raw materials; the synthesis mother solution is taken as a solvent; sodium hydroxide is taken as an assistant. Particularly, the method sequentially comprises the steps of feeding, dehydration, 1,4-p-dichlorobenzene dissolution, dropwise adding, pre-polymerization, filtering, washing, drying and package to form a polyphenylene sulfide product at last. The method takes the synthesis mother solution as the solvent; the dosage of pure N-methyl pyrrolidone in a polyphenylene sulfide resin synthesis process can be reduced; the recovery cost is greatly lowered; low molecular weight polyphenylene sulfide resin in the synthesis mother solution, sodium sulfide and 1,4-p-dichlorobenzene carry out polymerization reaction again by the action of a catalyst; the waste of the low molecular weight polyphenylene sulfide resin is reduced in a recovery process of the synthesis mother solution; the synthesis mother solution also contains a certain amount of catalyst; the dosage of the catalyst is reduced in the synthesis process, so that the production cost is further lowered.

Description

technical field [0001] The invention relates to the field of polymer materials, and more specifically relates to a method for preparing polyphenylene sulfide with synthetic mother liquor. Background technique [0002] Polyphenylene sulfide has excellent thermal stability, chemical stability, corrosion resistance and electrical properties, and has good affinity with various inorganic fillers. It can be compounded with various inorganic fillers and other polymer materials to make Various engineering plastics and blended alloys with excellent performance. In addition, polyphenylene sulfide (PPS) products have outstanding dimensional stability, and can be processed by almost all plastic processing methods, including spraying, injection molding, compression molding, extrusion, blowing and potting, etc., and the products can also be processed Secondary processing. Therefore, polyphenylene sulfide (PPS) has a wide range of applications in automobile manufacturing, electrical and ...

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Problems solved by technology

[0016] The invention provides a method for preparing polyphenylene sulfide by using synthetic mother liquor, wherein the synthetic mother liquor is the mother liquor produced in the previous batch of polyphenylene sulfide synthesis process, so as to solve the problem of relatively high cost of synthesizing PPS and high production energy consumption in the prior art The problem

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