Bisphenol A type sulfonated polysulfone copolymer and synthetic method thereof

Abstract

The invention provides a bisphenol A sulfonated polysulfone copolymer and a synthesis method thereof, which relates to a polysulfone copolymer and a synthesis method. The invention solves the problem that the synthesis by using the existing method has difficulties in controlling the degree of sulphonation of polysulfone copolymer and the side reactions occur easily. The molecular formula of the product of the invention is as the above formula, wherein, n and m represent degree of polymerization. The steps of the method are as follows: A. 4, 4'-dichlorodiphenyl sulfone, sulfonation dichlorodiphenyl sulfone and bisphenol A are dissolved in N-cymene-2- ketopyrrolidine, adding potassium carbonate and toluene; B. under the condition with temperature of 150 to 160 DEG C, toluene is removed after 4-hour refluxing ; the temperature is increased to 190 DEG C and the reaction is incubated for 16 to 35 hours with heat preservation; C. water or N is added and solid is precipitated in the N'-dimethylacetamide; then the precipitated solid is ground and filtered and washed by water; the precipitate is put into boiling deionized water, washed again and dried in vacuum, thus the steps are all finished. The polysulfone copolymer and the synthesis method of the invention effectively control the degree of sulphonation and have no occurrence of the side reactions and the production rate of the product of the invention is over 90 percent.

Description

technical field [0001] The invention relates to a polysulfone copolymer and a synthesis method thereof. Background technique [0002] As an effective method for modifying aromatic ring polymers, sulfonation has been widely used. There are two ways to synthesize sulfonated polysulfone copolymers, which are direct sulfonation of polymers and sulfonation of monomers. At present, most people adopt the method of direct sulfonation of polymers for synthesis. For example, some literatures have reported that polyether ether ketone and polyether sulfone are sulfonated with different sulfonating agents, such as concentrated sulfuric acid, chlorosulfonic acid, etc., and the sulfonation degree per repeat unit can reach 1.0. However, there are still some problems in the existing sulfonated polymers, such as: the reaction will be difficult to control due to the increase of the degree of sulfonation, and more stringent conditions must be adopted in order to obtain a product with a high d...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the degree of sulfonation of the polysulfone copolymer synthesized by the existing method is difficult to control and prone to side reactions, and provides a bisphenol A type sulfonated polysulfone copolymer and its synthesis method

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