Quaternary ammonium lateral group-containing phenolphthalein type polyarylether, copolymer thereof and method for preparing same

Abstract

The invention provides quaternary ammonium lateral groups-containing phenolphthalein type polyarylether and the method for preparing the same. The preparation method comprises the following steps of: dissolving a bisphenol monomer and a di-halogen monomer of tertiary amine lateral groups-containing phenolphthalein, which serve as raw materials, into an aprotic polar solvent to perform a reaction to obtain the tertiary amine lateral groups containing polyarylether; and after the reaction is ended, dissolving the obtained tertiary amine lateral groups-containing polyarylether in the aprotic polar solvent to perform a reaction with halogenated hydrocarbons. The preparation method can accurately control the positions and number of the quaternary ammonium functional groups, avoids the use of chloromethylation reagent(such as methylchloromethyl ether) which is highly poisonous and a strong carcinogen; and the obtained quaternary ammonium lateral groups containing phenolphthalein type polyarylether has good dissolvability and contributes to the further functionalized application; and the tertiary amine groups contained in the intermediate product of the tertiary amine lateral group-containing polyarylether easily make other similar reactions so as to derive other functional groups.

Description

technical field

[0001] The invention relates to the technical field of ion exchange membranes, in particular to a quaternary ammonium side group-containing phenolphthalein type polyarylether and a preparation method thereof, a quaternary ammonium side group-containing phenolphthalein type polyarylether copolymer and a preparation method thereof. Background technique

[0002] Quaternized polyarylethers have been widely used in nanofiltration membranes, ultrafiltration membranes, anion exchange resins, and conductive membranes for alkaline fuel cells. Existing preparation technology generally comprises three steps: polymerization, chloromethylation, quaternization, and reaction formula is as follows:

[0003]

[0004] This existing preparation technology is to introduce chloromethyl groups into the polymer main chain under catalytic conditions, which is easily affected by factors such as temperature, solvent, time, etc., and its position and number are random and cannot be ...

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