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A bis-phthalonitrile compound containing an imide ring, a high heat-resistant wave-transmitting composite material and a preparation method thereof

A technology of diphthalonitrile and composite materials, applied in the direction of organic chemistry, etc., can solve the problems of inability to meet performance and durability, low glass transition temperature, etc., and achieve high mechanical properties, excellent dielectric properties, and temperature resistance. high effect

Active Publication Date: 2022-06-21
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for conventional cyano resins, the glass transition temperature of the composite material is generally lower than 450°C, which cannot meet the performance and durability requirements in high-temperature oxidative environments such as aerospace.

Method used

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  • A bis-phthalonitrile compound containing an imide ring, a high heat-resistant wave-transmitting composite material and a preparation method thereof
  • A bis-phthalonitrile compound containing an imide ring, a high heat-resistant wave-transmitting composite material and a preparation method thereof
  • A bis-phthalonitrile compound containing an imide ring, a high heat-resistant wave-transmitting composite material and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In the high heat-resistant wave-transmitting composite material described in this embodiment, the polymerized monomer of the resin is a diphthalonitrile compound containing an imide ring, and its structural formula is shown in formula 14, the reinforcing material is a quartz fiber cloth, and For plain weave quartz cloth.

[0044]

[0045] Formula 14

[0046] The preparation method of the high heat-resistant wave-transmitting composite material of the present embodiment comprises the following steps:

[0047] S0. Preparation of imide ring-containing bisphthalonitrile resin solution. Weigh 4-aminophthalonitrile (286.3g, 2mol) and dissolve it in 870.8g DMF. After the 4-aminophthalonitrile is completely dissolved, add 2,3',3,4'-biphenyltetracarboxylic acid Anhydride (294.22g, 1mol) was stirred under nitrogen atmosphere for 12 hours to obtain the imide ring-containing diphthalonitrile resin solution (solid content of about 40wt%);

[0048] S1. Weigh 1000g of the imide ...

Embodiment 2

[0052] In the high heat-resistant wave-transmitting composite material described in this embodiment, the polymerized monomer of the resin is a diphthalonitrile compound containing an imide ring, and its structural formula is shown in formula 14, the reinforcing material is a quartz fiber cloth, and It is plain weave quartz cloth.

[0053]

[0054] Formula 14

[0055] The preparation method of the high heat-resistant wave-transmitting composite material of the present embodiment comprises the following steps:

[0056] S0. Preparation of imide ring-containing bisphthalonitrile resin solution. Weigh 4-aminophthalonitrile (286.3g, 2mol) and dissolve it in 870.8g DMF. After the 4-aminophthalonitrile is completely dissolved, add 2,3',3,4'-biphenyltetracarboxylic acid Dianhydride (294.22g, 1mol) was stirred under nitrogen atmosphere for 12 hours to obtain the imide ring-containing bisphthalonitrile resin solution (solid content of about 40wt%);

[0057] S1. Weigh 1000g of the i...

Embodiment 3

[0061] In the high heat-resistant wave-transmitting composite material described in this embodiment, the polymerized monomer of the resin is a diphthalonitrile compound containing an imide ring, and its structural formula is shown in formula 15, the reinforcing material is a quartz fiber cloth, and It is plain weave quartz cloth.

[0062]

[0063] Formula 15

[0064] The preparation method of the high heat-resistant wave-transmitting composite material of the present embodiment comprises the following steps:

[0065] S0. Preparation of imide ring-containing bisphthalonitrile resin solution. Weigh 4-aminophthalonitrile (286.3g, 2mol) and dissolve it in 1095.8g DMF. After the 4-aminophthalonitrile is completely dissolved, add hexafluorodianhydride (444.24g, 1mol) under nitrogen atmosphere Stir for 12 hours to obtain the imide ring-containing diphthalonitrile resin solution (solid content is about 40wt%);

[0066] S1. Weigh 1000g of the imide ring-containing bisphthalonitri...

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Abstract

The invention provides a bis-phthalonitrile compound containing an imide ring, a high heat-resistant wave-permeable composite material and a preparation method thereof. The bis-phthalonitrile compound containing an imide ring has a structural formula as 1; the imide ring-containing bis-phthalonitrile compound introduces the imide ring into phthalonitrile, so that the resin with the compound as a monomer has both polyimide and bis-phthalonitrile The advantages of the two polymer matrixes of dicyanonitrile resin, the temperature resistance of the new composite material is greatly improved, and the glass transition temperature is as high as 520 ° C, which can greatly break through the limitations of existing conventional materials in terms of temperature resistance improvement, and make up for it. There is a blank for conventional materials in the field of high temperature resistance. Formula 1.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a diphthalonitrile compound containing an imide ring, a high heat-resistant wave-transmitting composite material and a preparation method thereof. Background technique [0002] Wave-transmitting materials are composite materials that can transmit electromagnetic waves at a certain frequency. They are mainly used in aerospace and military fields to ensure that the detonation, guidance, communication and other systems of aircraft can work normally in extreme environments. In addition to good dielectric properties (dielectric constant less than 4, loss tangent less than 0.01), aviation wave-transmitting materials should also have high heat resistance, good mechanical properties, etc. to resist the aerodynamic heat generated during high-speed flight. . The matrix resin plays the role of bonding and transmitting load stress in the composite material, and its h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D209/48C07D487/04C08G73/06C08J5/04C08L79/04C08K7/10
Inventor 武元娥李松高龙飞沙晓涵肖沅谕柴笑笑李晶张桐
Owner 北京玻钢院复合材料有限公司