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Bi-phthalonitrile resin glass fiber composite material toughened by poly(arylene ether nitrile) and preparation method thereof

A technology of diphthalonitrile resin and diphthalonitrile is applied in the field of diphthalonitrile resin glass fiber composite material and preparation thereof, and can solve the problems of toughening phthalonitrile resin and the like, Achieve the effect of increasing the initial decomposition temperature, increasing the toughness and improving the curing time

Inactive Publication Date: 2010-09-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on using polyarylether nitrile as a toughening agent to toughen phthalonitrile resins

Method used

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  • Bi-phthalonitrile resin glass fiber composite material toughened by poly(arylene ether nitrile) and preparation method thereof
  • Bi-phthalonitrile resin glass fiber composite material toughened by poly(arylene ether nitrile) and preparation method thereof
  • Bi-phthalonitrile resin glass fiber composite material toughened by poly(arylene ether nitrile) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of the polyarylether nitrile toughened bisphthalonitrile resin glass fiber composite material provided by the present invention, such as figure 1 As shown, including the following steps:

[0027] Step 1: According to the mass ratio of polyarylene ether nitrile, bisphthalonitrile resin and glass fiber cloth, weighing the polyarylene ether nitrile powder and bis Phthalonitrile resin and glass fiber cloth.

[0028] Step 2: After heating and melting the bisphthalonitrile weighed in step 1, add polyarylene ether nitrile powder and stir to obtain a molten prepolymer of polyarylene ether nitrile and bisphthalonitrile resin.

[0029] Step 3: After the molten prepolymer of polyarylene ether nitrile and bisphthalonitrile resin obtained in step 2 is cooled, it is pulverized into powder.

[0030] Step 4: Disperse the molten prepolymer powder obtained in Step 3 evenly on the surface of the glass fiber cloth.

[0031] Step 5: Fold the glass fiber cloth treated in step ...

Embodiment 1

[0036] Example 1 The influence of different polyarylether nitrile content on the toughening effect of cured phthalonitrile resin

[0037] (1) The dosage of polyarylene ether nitrile is shown in Table 1:

[0038] Table 1

[0039] raw material

Sample 1

Sample 2

Sample 3

No. 4 sample

Polyarylene ether nitrile

0 grams

2.5g

5 grams

7.5g

Phthalonitrile resin

50 grams

47.5g

45 grams

42.5g

[0040] (2) Production process of polyarylene ether nitrile toughened bisphthalonitrile resin cured product:

[0041] 1. Melt and blend polyarylene ether nitrile and phthalonitrile resin at 250°C for 15 minutes.

[0042] 2. Pour it into the spline mold while it is hot, and heat up and cure according to the following program: 250℃~4 hours, 280℃~4 hours, 300℃~4 hours, 350℃~4 hours, 375℃~6 hours, its performance test The results are shown in Table 2:

[0043] Table 2

[0044]

[0045] The product performance test results in Table 2 show that when the added amount of polyarylene ether nitrile...

Embodiment 2

[0047] Example 2 Preparation of polyarylene ether nitrile toughened glass fiber phthalonitrile resin composite

[0048] (1) Material preparation:

[0049] Polyarylene ether nitrile 7.6 g

[0050] Glass fiber cloth 114 grams (20 layers, 20cm×20cm)

[0051] Phthaliconitrile resin 68.4 g

[0052] (2) Production process:

[0053] 1. Melt and blend polyarylene ether nitrile and phthalonitrile resin at 250°C for 15 minutes, then pulverize into powder after cooling.

[0054] 2. Sieving the powder through a 200-mesh screen, and evenly sprinkle the powder on the glass cloth, each glass cloth is about 3.6 ~ 3.7 grams of powder,

[0055] 3. The hydraulic press is heated to 260°C.

[0056] 4. Superimpose the powdered 20 layers of glass cloth and feed it into the press. The initial pressure is 9MPa, and the pressing procedure is 260℃~6 hours, 280℃~6 hours, 300℃~4 hours.

[0057] The product performance test results are shown in Table 3:

[0058] table 3

[0059] Bisphthalonitrile glass resin fiber comp...

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Abstract

The invention provides a bi-phthalonitrile resin glass fiber composite material toughened by poly(arylene ether nitrile) and a preparation method thereof, belonging to the macromolecular material technical field. The glass fiber composite material comprises a single-layer or multilayer glass fiber cloth and a copolymer of poly(arylene ether nitrile) and bi-phthalonitrile resin distributed on the surface of the single-layer glass fiber cloth or among the multilayer glass fiber cloth, wherein, the mass ratio of the copolymer of the poly(arylene ether nitrile) and the bi-phthalonitrile resin to the glass fiber cloth is 4:6; and the mass ratio of the poly(arylene ether nitrile) and the bi-phthalonitrile resin is (2-6): (34-38). The preparation method comprises the following steps: fusing and mixing the bi-phthalonitrile resin and poly(arylene ether nitrile) powder, cooling and pulverizing into powder, spraying the powder on the surface of the glass fiber cloth, laminating, molding by compression, and finally carrying out thermal treatment to obtain the composite material. In the invention, the bending strength of the bi-phthalonitrile resin glass fiber composite material toughened by the poly(arylene ether nitrile) is 500-650MPa, and the initial decomposition temperature is above 450 DEG C; and the composite material can be widely applied to the high-tech fields such as aerospace composite materials, machinery, electronic engineering and the like.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and particularly relates to a bisphthalonitrile resin glass fiber composite material and a preparation method thereof. Background technique [0002] The matrix resin plays the role of bonding and transferring load stress in the composite material. Its heat resistance, tensile properties, and chemical corrosion resistance are key factors that determine the performance of the composite material. Bisphthalonitrile resin is a kind of high performance thermosetting resin. It is a cured product formed by addition polymerization of cyano groups at high temperature. Due to its excellent thermal oxygen stability, chemical stability, low flammability, low water absorption and good processability, it is used in aerospace, micro High-tech fields such as electronics have broad application prospects. Although its high-temperature mechanical properties are much better than most thermosetting resins, it s...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08L71/08C08K7/00C08K7/14B32B17/10B32B27/22B29C43/58
Inventor 雷雅杰刘孝波钟家春赵睿
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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