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Modified phthalonitrile resin and preparation method thereof

A technology of phthalonitrile resin and phthalonitrile, which is applied in the field of phthalonitrile resin modification, can solve the problems of poor heat resistance, poor compatibility, and influence on mechanical properties of the resin, and improve the toughness of the resin , Improve compatibility, improve the effect of shear strength

Active Publication Date: 2021-02-19
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the traditional toughening method of phthalonitrile resin has poor compatibility, which causes its mechanical properties to be affected and the problem of poor heat resistance of the resin

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  • Modified phthalonitrile resin and preparation method thereof

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preparation example Construction

[0040] The present invention provides a kind of preparation method of the modified phthalonitrile resin described in the first aspect of the present invention in second aspect, described preparation method comprises the steps:

[0041] (1) take phthalonitrile resin, co-curable toughening agent and curing agent;

[0042] (2) phthalonitrile resin is melted;

[0043] (3) adding the co-curable toughening agent into the molten phthalonitrile resin and stirring to obtain a blend;

[0044] (4) Lowering the temperature of the blend, adding the curing agent and stirring to obtain a modified phthalonitrile resin.

[0045] According to some preferred embodiments, the melting temperature of the phthalonitrile resin is 100°C to 160°C;

[0046] In step (2), the phthalonitrile is melted to a homogeneous liquid.

[0047] According to some preferred embodiments, in step (3), the stirring time is 20-30 minutes.

[0048] According to some preferred embodiments, in step (4), the temperature o...

Embodiment 1

[0059] Formula is as follows (mass parts):

[0060] Phthalonitrile resin (resorcinol type phthalonitrile) 85

[0061] Co-curable toughener (containing phthalonitrile-terminated polyethersulfone) 10

[0062] Curing agent (diaminodiphenyl sulfone) 5

[0063] Wherein, the molar mass of the polyethersulfone end-capped with phthalonitrile is 2000 g / mol, and the number of functional groups containing phthalonitrile is 2;

[0064] The preparation method is as follows:

[0065] (1) Weighing resorcinol-type phthalonitrile, polyethersulfone and diaminodiphenylsulfone containing phthalonitrile-terminated polyethersulfone according to the ratio of parts by mass of 85:10:5;

[0066] (2) Melting resorcinol-type phthalonitrile to a homogeneous liquid at 150°C;

[0067] (3) Add polyethersulfone containing phthalonitrile-terminated polyethersulfone into the molten phthalonitrile resin, and stir for 30 minutes using a stirring device;

[0068] (4) Lower the temperature of the blend obtaine...

Embodiment 2

[0071] Formula is as follows (mass parts):

[0072] Phthalonitrile resin (bisphenol A phthalonitrile) 85

[0073] Co-curable toughener (containing phthalonitrile-terminated polyethersulfone) 10

[0074] Curing agent (diaminodiphenyl sulfone) 5

[0075] Wherein, the molar mass of the polyethersulfone end-capped with phthalonitrile is 2000g / mol, and the number of functional groups containing phthalonitrile is 2;

[0076] The preparation method is as follows:

[0077] (1) Weigh a certain amount of bisphenol A dicyanonitrile resin, polyethersulfone and diaminodiphenylsulfone containing phthalonitrile-terminated polyethersulfone according to the ratio of 85:10:5;

[0078] (2) Under the condition of 160°C, melt bisphenol A phthalonitrile to a homogeneous liquid;

[0079] (3) Add polyethersulfone containing phthalonitrile-terminated polyethersulfone into the molten phthalonitrile resin, and stir for 30 minutes using a stirring device;

[0080] (4) Lower the temperature of the bl...

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Abstract

The invention relates to modified phthalonitrile resin and a preparation method thereof. The modified phthalonitrile resin is composed of, by mass, 70-100 parts of phthalonitrile resin, 10-30 parts ofco-curable toughening agent and 0-10 parts of curing agent; and the composite material is cured and molded at 170-375 DEG C. The modified phthalonitrile resin system disclosed by the invention has arelatively long process window and proper melt viscosity, and is suitable for a molding process of a mould pressing composite material. The composite material provided by the invention has high strength and interlayer shear strength, and is suitable for high-temperature-resistant structural composite material parts.

Description

technical field [0001] The invention discloses a modified phthalonitrile resin and a preparation method, in particular to a modified benzonitrile resin containing a co-curable toughening agent and a preparation method, belonging to the technical field of phthalonitrile resin modification. Background technique [0002] The rapid development of aviation and aerospace industry has put forward higher requirements for the performance of materials in extreme environments. High strength, high modulus, high heat resistance, high toughness, and integration of structure and function have become the development trend. Phthalonitrile resin has been widely used in aerospace, ships, machinery, electronic materials and other fields due to its excellent high temperature resistance, outstanding chemical corrosion resistance, flame retardancy and moisture absorption resistance, and is currently the most It is one of the high temperature resistant resin systems with the potential of structure-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L71/10C08L81/06C08K5/41
CPCC08L79/04C08L81/06C08L71/00C08K5/41
Inventor 李峥夏雨郝春功许孔力许学伟谢永旺张志强宛枫
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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