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CN-121975156-A - High-performance polyphenyl ether material and preparation method thereof

CN121975156ACN 121975156 ACN121975156 ACN 121975156ACN-121975156-A

Abstract

The invention discloses a high-performance polyphenyl ether material and a preparation method thereof, wherein a modified polyphenyl ether reacts with a modified additive to enable bromine atom sites on the modified polyphenyl ether to react with phenolic hydroxyl groups on the modified additive, then the modified polyphenyl ether reacts with a modified carbon nano tube, a cross-linking agent and benzophenone to prepare a mixture, the mixture is dried in vacuum, and then reacts under the condition of ultraviolet irradiation to prepare the high-performance polyphenyl ether material, when the ultraviolet irradiation is carried out, double bonds on the modified carbon nano tube and double bonds on the modified polyphenyl ether can react with sulfhydryl groups on the cross-linking agent to form dynamic cross-linking, energy consumption can be further formed through dynamic bond exchange, and stress is actively relaxed and cracks are passivated, the modified polyphenyl ether reacts with the modified additive to form a cross-linking network, the modified additive is an organosilicon elastomer, and can be used as a stress concentration point to induce a matrix to generate a large amount of silver grains and shear bands, so that a large amount of energy is absorbed, and the cracks are prevented from further expanding.

Inventors

  • NING LEI
  • WU YIHONG

Assignees

  • 广东凯普瑞新材料科技有限公司

Dates

Publication Date
20260505
Application Date
20260312

Claims (10)

  1. 1. A preparation method of a high-performance polyphenyl ether material is characterized by comprising the following steps: Step A1, mixing and stirring Tris-HCl buffer solution and dopamine hydrochloride, adding a carbon nano tube, reacting to obtain a pretreated carbon nano tube, dispersing the pretreated carbon nano tube in ethanol, stirring and adding methacryloxypropyl trimethoxy silane and deionized water, and reacting to obtain a modified carbon nano tube; A2, mixing and stirring 1, 4-phenyldiboronic acid, 1-thioglycerol, deionized water and tetrahydrofuran, adding magnesium sulfate, and reacting to prepare a crosslinking agent; and step A3, mixing and stirring the modified polyphenyl ether, the modified additive and DMF, adding potassium carbonate and tetrabutylammonium bromide, reacting, adding the modified carbon nano tube, the cross-linking agent and the benzophenone, uniformly mixing to obtain a mixture, adding the mixture into a mold, drying in vacuum, and reacting under the irradiation of 365nm ultraviolet light to obtain the high-performance polyphenyl ether material.
  2. 2. The method for preparing the high-performance polyphenyl ether material according to claim 1, wherein the usage amount ratio of the Tris-HCl buffer solution, the dopamine hydrochloride and the basalt fiber in the step A1 is 0.5mL to 1g to 10g.
  3. 3. The method for preparing the high-performance polyphenyl ether material according to claim 1, wherein the dosage ratio of 1, 4-phenyldiboronic acid, 1-thioglycerol, deionized water, tetrahydrofuran and magnesium sulfate in the step A2 is 18 mmol/38 mmol/0.1 mL/80 mL/5 g.
  4. 4. The method for preparing the high-performance polyphenyl ether material according to claim 1, wherein the dosage ratio of the modified polyphenyl ether, the modified additive, DMF, potassium carbonate, tetrabutylammonium bromide, the modified carbon nano tube, the crosslinking agent and the benzophenone in the step A3 is 2g:0.7g:60mL:7mmol:7mmol:0.1g:0.5g:0.01g.
  5. 5. The method for preparing high-performance polyphenyl ether material as set forth in claim 1, wherein the modified polyphenyl ether is prepared by the following steps: Step B1, mixing polyphenyl ether, 2-methacrylic anhydride and chlorobenzene, introducing nitrogen for protection, reacting to obtain pretreated polyphenyl ether, dissolving the pretreated polyphenyl ether in chlorobenzene, introducing nitrogen for protection, stirring, adding N-bromosuccinimide and benzoyl peroxide, and reacting to obtain functionalized polyphenyl ether; and B2, mixing lithium dimethylhydrogen silanol with tetrahydrofuran, introducing nitrogen for protection, stirring, adding hexamethylcyclotrisiloxane, heating for reaction, adding dodecyl trichlorosilane, continuing to react to obtain branched polysiloxane, mixing functionalized polyphenyl ether, branched polysiloxane, a Kanst catalyst and DMF, introducing nitrogen for protection, and reacting to obtain the modified polyphenyl ether.
  6. 6. The method for preparing a high-performance polyphenyl ether material according to claim 5, wherein the mass ratio of the polyphenyl ether to the 2-methacrylic anhydride in the step B1 is 3:1, the type of the polyphenyl ether is SA90, and the use amount ratio of the pretreated polyphenyl ether, the N-bromosuccinimide and the benzoyl peroxide is 1g:12.5mmol:0.6mmol.
  7. 7. The method of preparing a high performance polyphenylene ether material as set forth in claim 5, wherein the molar ratio of Si-Cl on lithium dimethylhydridosilyl, hexamethylcyclotrisiloxane and dodecyl trichlorosilane in step B2 is 1:3:1, the molar ratio of functionalized polyphenylene ether to branched polysiloxane is 2n+1:n, and n is a natural number greater than 0.
  8. 8. The method for preparing high-performance polyphenyl ether material as set forth in claim 1, wherein the modified additive is prepared by the following steps: Mixing isophorone diisocyanate, hydroxyl-terminated polydimethylsiloxane, 1, 4-butanediol, dibutyltin dilaurate and tetrahydrofuran, introducing nitrogen for protection, cooling, adding adipic dihydrazide, continuing the reaction, adding para-aminophenol, and reacting to obtain the modified additive.
  9. 9. The method for preparing a high-performance polyphenyl ether material according to claim 8, wherein the molar ratio of isophorone diisocyanate, hydroxyl-terminated polydimethylsiloxane, 1, 4-butanediol, adipic acid dihydrazide and p-aminophenol is 40:20:5:5:15.
  10. 10. A preparation method of a high-performance polyphenyl ether material is characterized by comprising the steps of preparing the high-performance polyphenyl ether material according to any one of claims 1-9.

Description

High-performance polyphenyl ether material and preparation method thereof Technical Field The invention relates to the technical field of polyphenyl ether preparation, in particular to a high-performance polyphenyl ether material and a preparation method thereof. Background Polyphenylene oxide, the academic name of which is poly 2, 6-dimethyl-1, 4-phenyl ether, PPO or PPE for short, is a thermoplastic resin synthesized by the common electric company in the United states in the last 60 th century by an oxidative coupling method, and is combined with polyamide, polycarbonate, polyoxymethylene and polyester to be called as five-large common engineering plastics. The molecular structure of polyphenyl ether mainly comprises benzene ring and ether bond, and the molecular skeleton is a chain structure formed by connecting one carbon atom on the benzene ring with oxygen atom on another benzene ring. The PPO molecule has good thermal performance, mechanical performance, chemical resistance and excellent electrical performance due to the combined action of the rigidity of benzene rings and the stability of ether bonds, but the pure PPO has poor solvent resistance and low impact strength, so that the application development of the PPO is limited to a certain extent. Disclosure of Invention The invention aims to provide a high-performance polyphenyl ether material and a preparation method thereof, which solve the problems that the polyphenyl ether material in the prior art is large in brittleness and easy to damage after being impacted. The aim of the invention can be achieved by the following technical scheme: the preparation method of the high-performance polyphenyl ether material specifically comprises the following steps: Mixing Tris-HCl buffer solution and dopamine hydrochloride, stirring and adding carbon nano tubes at the rotating speed of 200-300r/min and the temperature of 20-25 ℃ for reacting for 20-25 hours to obtain pretreated carbon nano tubes, dispersing the pretreated carbon nano tubes in ethanol, stirring and adding methacryloxypropyl trimethoxy silane and deionized water at the rotating speed of 200-300r/min and the temperature of 60-70 ℃ for reacting for 3-5 hours to obtain modified carbon nano tubes; Step A2, uniformly mixing 1, 4-phenyldiboronic acid, 1-thioglycerol, deionized water and tetrahydrofuran, stirring and adding magnesium sulfate under the condition of the rotating speed of 150-200r/min and the temperature of 25-30 ℃ for reacting for 20-25h to obtain a crosslinking agent; and step A3, uniformly mixing the modified polyphenyl ether, the modified additive and DMF, stirring and adding potassium carbonate and tetrabutylammonium bromide at the rotation speed of 200-300r/min and the temperature of 35-40 ℃ for reaction for 1.5-2h, adding the modified carbon nano tube, the cross-linking agent and the benzophenone, uniformly mixing to obtain a mixture, adding the mixture into a mold, vacuum drying, and reacting for 90-100s under the irradiation of 365nm ultraviolet light to obtain the high-performance polyphenyl ether material. Further, the ratio of the Tris-HCl buffer solution to the dopamine hydrochloride to the basalt fiber in the step A1 is 0.5mL:1g:10g, the pH value of the Tris-HCl buffer solution is 8.5, and the amount of the methacryloxypropyl trimethoxy silane is 3% of the mass of the pretreated carbon nano tube. Further, the dosage ratio of 1, 4-phenyldiboronic acid, 1-thioglycerol, deionized water, tetrahydrofuran and magnesium sulfate described in step A2 was 18mmol:38mmol:0.1mL 80mL 5g. Further, the dosage ratio of the modified polyphenyl ether, the modified additive, DMF, potassium carbonate, tetrabutylammonium bromide, the modified carbon nano tube, the crosslinking agent and the benzophenone in the step A3 is 2g:0.7g:60mL:7 mmol:0.1g:0.5g:0.01g. Further, the modified polyphenylene ether is prepared by the following steps: Step B1, mixing polyphenyl ether, 2-methacrylic anhydride and chlorobenzene, introducing nitrogen for protection, reacting for 3-5 hours at the rotating speed of 120-150r/min and the temperature of 70-75 ℃ to obtain pretreated polyphenyl ether, dissolving the pretreated polyphenyl ether in chlorobenzene, introducing nitrogen for protection, stirring and adding N-bromosuccinimide and benzoyl peroxide at the rotating speed of 150-200r/min and the temperature of 80-85 ℃ to react for 1-1.5 hours to obtain functional polyphenyl ether; And B2, mixing lithium dimethylhydrosilyl and tetrahydrofuran, introducing nitrogen for protection, stirring and adding hexamethylcyclotrisiloxane at the rotating speed of 150-200r/min and the temperature of 0 ℃, heating to 20-25 ℃, reacting for 20-24 hours, adding dodecyl trichlorosilane, continuing to react for 2-3 hours to obtain branched polysiloxane, mixing the functionalized polyphenyl ether, the branched polysiloxane, a Kanster catalyst and DMF, introducing nitrogen for protection, and reacting for 6-8 hours at the rotating speed of