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A kind of resin polymer with high modulus and high glass transition temperature and preparation method thereof

A technology with high glass transition and transition temperature, applied in the field of resin-based composite materials, can solve the problems of high polymer brittleness, low glass transition temperature, and limitations, and achieve the effect of simple process and easy promotion

Active Publication Date: 2021-06-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above that the modulus of the resin-based composite material mainly depends on the modulus of the resin polymer, and the modulus of the above-mentioned thermosetting resin polymer is generally 2.8-4.5GPa, and there is no obvious improvement or improvement after years of research , and although the modulus of the resin system can be increased to a certain extent by increasing the cross-linking density of the polymer, it will also obviously lead to a greater brittleness of the polymer, which cannot meet the application requirements of high-strength structural materials; in addition, currently commonly used thermosetting resins The glass transition temperature is relatively low, which will be greatly limited in the application fields with strict thermal stability requirements

Method used

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  • A kind of resin polymer with high modulus and high glass transition temperature and preparation method thereof
  • A kind of resin polymer with high modulus and high glass transition temperature and preparation method thereof
  • A kind of resin polymer with high modulus and high glass transition temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) 14 grams of benzide nitrile-based resin and 6 grams of expanded agent (a dominated ether) were sequentially added to 15 ml N, N-dimethylformamide, resulting in a uniform transparent solution;

[0052] (2) 2 ml of toluene solvent is added to the uniform solution in (1), and the reflux temperature of the regulatory system is in the range of 120-155 ° C;

[0053] (3) The resulting solution system was slowly warmed, and the control system temperature was stirred in the range of 130-140 ° C for 2 hours, and the viscosity was weakly lifted uniform solution;

[0054] (4) Continue to increase the temperature to 150-155 ° C in (3), stir vigorously, and maintain the system temperature stirring reaction for 2 hours to obtain a viscosity of viscosity and increased viscosity;;

[0055] (5) Maintain the stirring rate, adjust the reaction device, receive a sewer device, and slowly evaporated the mixed solvent, and the viscosity of the reaction solution is significantly increased, and ...

Embodiment 2

[0060] (1) 14 grams of benzoxazine-based resin and 5 grams of expanded agent (bisphenol C) were sequentially added to 15 mln, N-dimethylformamide, resulting in a uniform transparent solution;

[0061] (2) 2 ml of toluene solvent is added to the uniform solution in (1), and the reflux temperature of the regulatory system is in the range of 120-155 ° C;

[0062] (3) The resulting solution system is slowly warmed, and the control system temperature is stirred in the range of 130-140 ° C for 1 hour, resulting in a uniform solution having a weak increase in viscosity;

[0063] (4) Continue to increase the temperature to 150-155 ° C in (3), stir vigorously, and maintain the system temperature stirring reaction for 3 hours to obtain a viscosity of viscosity and increased viscosity;;

[0064] (5) Maintain the stirring rate, adjust the reaction device, receive a sewer device, and slowly evaporated the mixed solvent, and the viscosity of the reaction solution is significantly increased, and...

Embodiment 3

[0069] (1) 14 grams of phenylphenylzanitrile-based resin and 4 grams of expansion agent (phenolphthalene aromatic ether nitrile) were sequentially added to 20 mL N, N-dimethylformamide to obtain a uniform transparent solution;

[0070] (2) 3 ml of toluene solvent is added to the homogeneous solution in (1), and the reflux temperature of the regulatory system is in the range of 120-155 ° C;

[0071] (3) The resulting solution system was slowly warmed, and the control system temperature was stirred in the range of 130-140 ° C for 2 hours, and the viscosity was weakly lifted uniform solution;

[0072] (4) Continue to increase the temperature to 150-155 ° C in (3), stir vigorously, and maintain the system temperature stirring reaction for 3 hours to obtain a viscosity of viscosity and increased viscosity;;

[0073] (5) Maintain the stirring rate, adjust the reaction device, receive a sewer device, and slowly evaporated the mixed solvent, and the viscosity of the reaction solution is s...

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Abstract

The invention discloses a resin polymer with high modulus and high glass transition temperature. The resin polymer comprises the following components: a benzoxazine-containing nitrile-based resin, a chain extender and N,N-dimethyl Formamide, the preparation process is to add benzoxazine-containing nitrile-based resin and chain extender to N,N-dimethylformamide in turn to obtain a uniform and transparent solution; add toluene solvent to the obtained solution to adjust the system reflux temperature; control the system temperature at 130-155°C, stir to obtain a viscous solution system; transfer to a preheated mold, and dry and shape at 120-200°C; after heat treatment, slowly cool down and demould , to obtain a resinous polymer. The invention provides a resin polymer with high modulus and high glass transition temperature through molecular structure design and orderly reaction between functional groups to control the degree of polymerization and spatial arrangement of the resin polymer.

Description

Technical field [0001] The present invention relates to the technical field of resin matrix composites, and more particularly to a resin polymer of a high modulus and a high glass transition temperature and a preparation method thereof. Background technique [0002] With the high-speed development of aerospace and rail transit field, the relevant fields propose lightweight and high performance requirements to meet the new materials used in harsh environments, with resin-based composite materials due to high specific intensity and lightweight properties worldwide. s concern. [0003] It is well known that the performance of the resin-based composite is mainly dependent on the binding effect between resin polymers, enhancements and resins and enhancements, carbon fiber as the currently recognized strength than intensity enhanced fiber material has been widely used in aerospace, track Among the fields of transportation, there are excellent structural stability and structural enhance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G14/073C08L61/34
CPCC08G14/06C08L61/34
Inventor 徐明珍李博任登勋陈林陈思静李逵袁悦刘孝波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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