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Polysulfone and preparation method thereof

A technology of polysulfone and cross-linked polystyrene, applied in the field of polysulfone and its preparation, a method and the polysulfone obtained therefrom, can solve the problem that the catalyst cannot be recycled, etc., to increase market competitiveness and appearance Excellent, catalytic activity improvement effect

Active Publication Date: 2021-06-22
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through structural design, a supported catalyst with long spacer arms was synthesized, which not only solved the problem that the catalyst could not be recycled, but also greatly improved the catalytic activity, which has practical production significance

Method used

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  • Polysulfone and preparation method thereof
  • Polysulfone and preparation method thereof
  • Polysulfone and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Put 0.05mol cross-linked polystyrene microspheres (PSD10000-L5, Suzhou Zhiwei Nano Technology Co., Ltd.) mol chloroacetyl chloride, blow nitrogen, slowly add 0.075mol anhydrous aluminum trichloride, react at room temperature for 4h. After the reaction is finished, the product mixture is treated with 1 mol / L dilute hydrochloric acid, the product is washed with distilled water until the washing liquid does not contain chloride ions, and after vacuum drying, chloroacetyl cross-linked polystyrene microspheres are obtained. The content of chloroacetyl group is 3.51mmol / g as determined by oxygen nitrogen combustion-Volhard method.

[0044] In a four-necked flask equipped with a stirrer, a reflux condenser and a thermometer, add 4.02g of chloroacetyl crosslinked polystyrene (chloroacetyl content: 14.1mmol), 50mL of N,N-dimethylformamide, and swell After 12 hours, add 28.2 mmol of triethylamine, and stir the reaction at 80°C for 24 hours. After the reaction, wash the product m...

Embodiment 2

[0047] The preparation process of the cross-linked polystyrene immobilized tributylmethyl ammonium chloride with propionyl spacer is the same as in Example 1, except that 28.2mmol tributylamine is used instead of triethylamine as a quaternization reagent, which is determined by elemental analysis , the bonding amount of the quaternary ammonium group was 3.16 mmol / g.

[0048] In a four-necked reaction flask with oil bath heating, stirrer, water separator and condenser, add 0.1mol bisphenol S, 0.1mol sodium carbonate, 0.098mol 4,4'-dichloro Diphenyl sulfone, 0.32g cross-linked polystyrene immobilized tributylmethylammonium chloride (quaternary ammonium group content 1mmol), 409.68g N,N-dimethylformamide, stirring nitrogen for 0.5h, the oil bath The temperature was raised to 170°C (system temperature 153°C), 125g of N,N-dimethylformamide was distilled off, and the reaction was continued for 3h to obtain a yellow viscous polysulfone solution. Methyl chloride gas (gas flow rate: 1...

Embodiment 3

[0050] The preparation process of the cross-linked polystyrene immobilized dodecyltrimethylammonium chloride with valeryl spacer arm is the same as that of Example 1, except that 28.2 mmol of dodecyldimethylamine is used as the quaternizing agent, The bonding amount of the quaternary ammonium group was determined to be 3.3 mmol / g by elemental analysis.

[0051] 1mol bisphenol A, 2mol potassium carbonate, 0.95mol 4,4'-dichlorodiphenyl sulfone, 30.3g cross-linked polystyrene immobilized dodecyltrimethylammonium chloride (quaternary ammonium group content 0.1mol ), 0.98kg sulfolane, put into the reaction kettle with temperature control, stirring and reflux water separation device at one time, nitrogen purging for 0.5h, the temperature of the reaction kettle was raised to 300°C (system temperature 285°C), and 120g of sulfolane was evaporated , Continue to react for 10h to obtain yellow viscous polysulfone solution. Methyl chloride gas (gas flow rate: 1 L / min) was introduced into ...

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Abstract

The invention discloses a preparation method of polysulfone. The method comprises the following steps: 1) adding an organic bisphenol compound, 4, 4'-dichlorodiphenyl sulfone, a salt-forming agent, a catalyst and an aprotic polar solvent into a reaction container, heating to the boiling point of the aprotic polar solvent, and evaporating to remove part of the solvent; 2) keeping the temperature, and reacting for a certain time to obtain a viscous polysulfone solution; 3) introducing an end-capping reagent into the system for end capping; and 4) separating out the product in a precipitating agent, and carrying out a post-treatment process to obtain polysulfone powder. The polysulfone is prepared by adopting a one-step method, a non-water-soluble hydrocarbon solvent does not need to be used, the operation is simple, the post-treatment difficulty and the production cost are reduced, meanwhile, the crosslinked polystyrene immobilized quaternary ammonium salt with a long spacer arm is adopted as the catalyst, the reaction activity is improved, the obtained product is high in molecular weight and narrow in molecular weight distribution, the catalyst is easy to recover, the product can be recycled, and the purity of the product is improved.

Description

technical field [0001] The invention relates to a polysulfone and a preparation method thereof, in particular to a method for efficiently catalyzing the preparation of polysulfone and the polysulfone obtained thereby, belonging to the field of polymer materials. Background technique [0002] Polysulfone is an important thermoplastic special engineering plastic, mainly including polyethersulfone (PES), bisphenol A polysulfone (PSU), polyphenylene sulfone (PPSU) and so on. Polysulfone resin has excellent properties, such as excellent mechanical properties, high temperature resistance, chemical corrosion resistance, aging resistance and so on. These characteristics make this type of material widely used in many fields such as aerospace, national defense, electrical and electronic, medical, nuclear power, oil well, ship, magnetic wire, military industry, automobile manufacturing industry and food processing. [0003] The preparation method of polysulfone is mainly divided into ...

Claims

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Application Information

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IPC IPC(8): C08G75/20
CPCC08G75/20Y02P20/584
Inventor 邹敏张鑫陈海波
Owner WANHUA CHEM GRP CO LTD
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