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Soluble and ultraviolet-crosslinked polyaryl ether nitrile and preparation method thereof

A polyarylether nitrile and cross-linking technology, which is applied in the field of polyarylether nitrile high-performance materials and its preparation, can solve the problems of poor solvent resistance and stress crack resistance, and achieve improved organic solvent resistance and excellent solvent resistance and stress crack resistance, heat resistance and strength improvement effect

Inactive Publication Date: 2016-04-06
吉林省聚科高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solvent resistance and stress cracking resistance of polyarylether nitrile are poor, and the method of thermally crosslinking the polar nitrile group is usually used to make the linear molecules of polyarylether nitrile bonded and crosslinked into a stable three-dimensional network structure. Further obtain materials with high strength, higher heat resistance, and good solvent resistance, and solve the shortcomings of the material itself

Method used

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  • Soluble and ultraviolet-crosslinked polyaryl ether nitrile and preparation method thereof
  • Soluble and ultraviolet-crosslinked polyaryl ether nitrile and preparation method thereof
  • Soluble and ultraviolet-crosslinked polyaryl ether nitrile and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] With 14.04g (0.101mol) 2,6-difluorobenzonitrile, 1.93g (0.095mol) of hexafluorobisphenol A, 173ml sulfolane (using sulfolane as solvent, the amount of solvent added is preferably 20-35% of solid content, The amount of sulfolane in this embodiment is calculated according to the solid content of 20%), 14.49g (0.105mol) of anhydrous potassium carbonate, and 40ml of xylene are added in a 500ml three-necked flask equipped with mechanical stirring, a thermometer and nitrogen protection, and the temperature is raised to 140 ~ 160°C, reflux xylene with water for 2 hours, raise the temperature to 180-210°C for 2-3 hours, cool the system below 100°C, add 1.20g (0.005mol) 4,4'-dihydroxychalcone [4,4 '-Dihydroxychalcone is used as the cross-linking point, and the cross-linking point content is 5%, that is, 4,4'-dihydroxychalcone / (4,4'-dihydroxychalcone+hexafluorobisphenol A) The molar ratio is 5%], the temperature is raised to 140-160°C, the xylene is refluxed with water for 2 hour...

Embodiment 2

[0019] The method is as in Example 1, and the hexafluorobisphenol A is replaced by bisphenol A and phenolphthalein in turn, and the bisphenol A unit or phenolphthalein in the polymer structure formula replaces the hexafluorobisphenol A unit. Finally, the white polyarylether nitrile powder sample [that is, 4,4'-dihydroxychalcone / (4,4'-dihydroxychalcone) with a crosslinking point (4,4'-dihydroxychalcone) content of 5% is obtained respectively. The molar ratio of hydroxychalcone+bisphenol A) is 5%; the molar ratio of 4,4'-dihydroxychalcone / (4,4'-dihydroxychalcone+phenolphthalein) is 5%], producing The rate is 96-98%.

Embodiment 3

[0021] The method is as in Example 1 and Example 2, changing the molar content of 4,4'-dihydroxychalcone to 10%, 15%, 20%, 25%, 30%, 35%, and 40% in turn, [4, 4'-Dihydroxychalcone / (4,4'-Dihydroxychalcone + Hexafluorobisphenol A), 4,4'-Dihydroxychalcone / (4,4'-Dihydroxychalcone +bisphenol A), the molar ratio of 4,4'-dihydroxychalcone / (4,4'-dihydroxychalcone+phenolphthalein) is 10%, 15%, 20%, 25%, 30%, respectively , 35%, 40%], a series of soluble polyarylether nitrile polymers with different crosslinking point contents were prepared, and the yield was 96-98%. For the polymer structures of Examples 1 to 3, refer to the polymer structure (I).

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Abstract

The invention relates to soluble and ultraviolet-crosslinked polyaryl ether nitrile and a preparation method thereof, belonging to the field of high polymer materials. According to the preparation method, a series of high-performance solution-processable and ultraviolet-crosslinked polyaryl ether nitrile materials can be prepared from three bisphenol monomer compounds and bisfluorine monomer compounds which contain allyl and vinyl by virtue of nucleophilic substitution. In the preparation method, toluene or xylene can be selected as a dehydrating agent, sulfolane, N-methyl pyrrolidone, dimethyl sulfoxide or N,N-dimethylacetamide is selected as a solvent, the content of crosslinking points is controlled at 5%-40%, and the crosslinking points are uniformly distributed in a main polymer chain structure in a blocking manner. The preparation method has the advantages that a crosslinked membrane material has excellent solvent resistance and stress cracking resistance on the premise that the heat resistance, low creep property, dimensional stability and solution processability of the polyaryl ether nitrile material are preserved, and meanwhile, the heat resistance and the strength of the membrane material are further improved; the application range of the membrane material is broadened.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a novel soluble and curable polyarylether nitrile high-performance material and a preparation method thereof. Background technique [0002] Polyarylether nitrile is a kind of linear aromatic ring polymer with special molecular structure. Its macromolecular main chain is composed of rigid and heat-resistant phenylene, flexible and heat-resistant oxygen ether bonds and strong polar nitrile Composition of basal and side groups. Oxygen-ether bonds endow polyarylether nitrile molecular chains with good flexibility and ease of processing. The presence of nitrile side groups not only helps to improve the solubility of polymers, but also enhances the interaction between polymer molecular chains, leading to polymerization. The energy required for the movement of the chain segments increases, improving the heat resistance of the polymer, and the nitrile group can improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/40C08G65/46
CPCC08G65/40C08G65/4093C08G65/46
Inventor 白迪
Owner 吉林省聚科高新材料有限公司
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