Random copolymer containing biphenyl structural polyether sulfone and polyether ketone sulfone and preparation method thereof

Abstract

The invention relates to a random copolymer containing biphenyl structural polyether sulfone and polyether ketone sulfone and a preparation method thereof, and belongs to the field of high molecular materials. The preparation method comprises the following steps: using 4,4'-dichlorodiphenyl sulfone, 4,4'-dihydroxy biphenyl and 4,4'-dihydroxy diphenyl ketone as raw materials, anhydrous potassium carbonate as salt forming agent, N-methyl ketopyrrolidine or cyclobutyl sulfone as solvent, and methylbenzene or dimethyl benzene as water carrier; adding the raw materials, the salt forming agent, the solvent and the water carrier into a container provided with a mechanical stirrer and a thermometer, under the protection of nitrogen, heating the mixture to reflow with water, vaporizing redundant water carrier, and reacting the mixture for 4 hours at a temperature of between 160 and 240 DEG C to obtain a coarse product; and boiling the coarse product with ethanol or acetone, filtering the mixture, boiling the filtrate with distilled water, filtering the mixture, and drying the sediment to obtain a refined polymer product. The polymer has good compatibility for polyaryletherketone and polyarylethersulfone; and the preparation method is simple and convenient and has low cost.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to the preparation technology of polyether ether sulfone and polyether ketone ether sulfone random copolymers containing biphenyl structure Background technique [0002] Biphenyl-containing polyether ether sulfone is a special functional plastic with excellent performance. It has comprehensive characteristics such as good heat resistance, high mechanical strength, and excellent electrical properties. It has been widely used in many industrial fields. However, polyarylethersulfone also has some disadvantages: as a thermoplastic, polyarylethersulfone is still sensitive to certain solvents, especially under stress; when loaded at higher temperatures, polyarylethersulfone will Creep occurs. These disadvantages limit the application of biphenyl polyether ether sulfone when resistance to certain specific solvents and high temperature dimensional stability are required. However, compared...

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Problems solved by technology

However, polyarylethersulfone also has some disadvantages: as a thermoplastic, polyarylethersulfone is still sensitive to certain solvents, especially under stress; when loaded at higher temperatures, polyarylethersulfone will Creep occurs

The glass transition temperature of polyarylether ketone is not high enough, the processing temperature is high, the transparency is not good, and the current price is high; the high temperature resistance grade of polyarylether sulfone is far inferior to that of polyarylether ketone, and its mechanical properties are not as good as polyarylether ketone. , but the cost is only one-fifth of polyaryletherketone, and the processing temperature is lower (300°C)

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