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Branched polymer, preparation thereof and foam material

A technology of branched polymers and polymers, applied in the field of branched polymers, preparation methods and foam materials, which can solve the problem of the reduction of polymer molecular weight and mechanical properties, affecting the performance of polymer foams, polymer post-treatment and processing Difficulties and other problems, to achieve the effect of good mechanical strength

Active Publication Date: 2022-03-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the introduction of multifunctional monomers, the polymerization process is prone to cross-linking, which will cause difficulties in the post-treatment and processing of the polymer. It is necessary to reduce the degree of reaction to avoid the occurrence of cross-linking, but this will make the polymer more difficult. The molecular weight and mechanical properties are reduced, which affects the performance of polymer foams

Method used

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  • Branched polymer, preparation thereof and foam material
  • Branched polymer, preparation thereof and foam material
  • Branched polymer, preparation thereof and foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add phenolphthalein (100mmol), 4,4-difluorobenzophenone (127mmol), 1,1,1-tris(4-hydroxyphenyl)ethane (8mmol), K 2 CO 3 (125mmol), TMS (130ml), toluene (50ml), under the condition of nitrogen protection, heat the above mixture to 150°C to azeotropically remove water, keep the temperature for 2h, remove toluene and produced water, continue to heat to 220°C for 2h, cool down To 150°C, add (4-fluorobenzene)-(4-hydroxy-3phenylbenzene)methanone (150mmol) and toluene (50ml) to react for 2h, remove the toluene, then raise the temperature to 220°C for 2h, end the reaction, add Dilute with 250ml DMAc, precipitate in ethanol-water (50:50) mixed solution, filter and pulverize the precipitate, and repeatedly boil and wash with deionized water for 5 times, 60min each time, remove inorganic salt and residual solvent, dry, That is, the long-chain branched polyaryletherketone having the structure of formula (III) is obtained. (10<m+p<15,5<m<10,5<p<10,20<n<30,10<y<20)

[0043]

[0...

Embodiment 2

[0052] Add phenolphthalein (100mmol), 4,4-difluorodiphenyl sulfone (125mmol), phloroglucinol (8mmol), K 2 CO 3 (125mmol), TMS (130ml), toluene (50ml), under the condition of nitrogen protection, heat the above mixture to 150°C to azeotropically remove water, keep the temperature for 2h, remove toluene, continue to heat to 220°C for 2h, cool to 150°C, Add 4-fluoro-4'-hydroxydiphenyl sulfone (150mmol) and toluene (50ml) to react for 2h, remove the toluene and the water produced, then raise the temperature to 220°C for 2h, and finish the reaction. Precipitate in water (50:50), filter and pulverize the precipitate, and repeatedly boil and wash with deionized water 5 times, each time for 60 minutes, remove inorganic salt and residual solvent, and dry to obtain the compound with the structure of formula (V) Polyaryl ether sulfone with long-chain branched structure. (10<m+p<15,5<m<10,5<p<10,20<n<30,10<y<20)

[0053]

[0054] Mold the pulverized and dried powder sample in a hot ...

Embodiment 3

[0060] Add phenolphthalein (100mmol), 4,4-difluorodiphenylsulfone (127mmol), 1,3,5-tris(4-hydroxyphenyl)benzene (3mmol), K 2 CO 3 (125mmol), TMS (130ml), toluene (50ml), under the condition of nitrogen protection, heat the above mixture to 150°C to azeotropically remove water, keep the temperature for 2h, remove toluene and produced water, continue to heat to 220°C for 2h, cool down To 150°C, add 4-fluoro-4'-hydroxydiphenyl sulfone (150mmol) and toluene (50ml) to react for 2h, remove the toluene, then raise the temperature to 220°C for 2h, end the reaction, add 250ml of DMAc to dilute, then add Precipitate in water (50:50), filter and pulverize the precipitate, and repeatedly boil and wash with deionized water for 5 times, each time for 60 minutes, remove inorganic salt and residual solvent, and dry to obtain the compound with the structure of formula (VI). Long-chain branched polyarylethersulfone. (15<m+p<20,5<m<10,5<p<10,20<n<30,10<y<20)

[0061]

[0062] Mold the pulv...

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Abstract

The invention provides a branched polymer and a preparation method thereof, solves the problem of crosslinking in the existing branched polyaryletherketone (sulfone) preparation process, and realizes unification of high branching degree and high molecular weight of branched polyaryletherketone (sulfone). The structural formula of the polymer is shown as a formula (I) or a formula (II). The invention also provides a foam material prepared by taking the polymer as matrix resin, and the foaming mode is supercritical carbon dioxide foaming.

Description

technical field [0001] The invention belongs to the field of polymer synthesis and processing, and in particular relates to a branched polymer, a preparation method and a foam material thereof. Background technique [0002] Aerospace, rail transit, national defense equipment and other fields need to use a large amount of polymer foam due to the demand for weight reduction. Due to the particularity of these fields, the requirements for polymer foam are very high, such as high temperature resistance, flame retardancy, high mechanical Therefore, the development of high-performance foam materials has become an important research direction. Polyaryletherketone (sulfone) foam is a kind of thermoplastic high-performance foam material, which has the characteristics of radiation resistance, chemical corrosion resistance, high heat resistance and good flame retardancy. It has broad application in weight loss and heat preservation of high-end equipment. application prospects. The foa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/40C08G75/23C08J9/12C08L71/10C08L81/06
CPCC08G65/4012C08G75/23C08J9/122C08G2650/30C08G2650/40C08J2371/10C08J2381/06C08J2203/06
Inventor 周光远王红华赵继永王志鹏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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