Modified PBO fiber/cyanate ester resin wave-transparent composite material and preparation method thereof

A technology of cyanate ester resin and composite materials, which is applied in fiber type, fiber treatment, textile and paper making, etc., and can solve problems such as poor interface bonding performance and strong chemical inertness

Active Publication Date: 2015-07-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of PBO fiber is very smooth, showing strong chemical inertness, and the interface bonding performance with the polymer resin matrix is ​​poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: 130 parts (the "parts" described below are parts by mass.) PBO fibers were soaked in absolute ethanol for 24 hours, cleaned with deionized water, and placed in an ultrasonic instrument (100W, 25°C) Ultrasonic treatment for 30 minutes, after taking it out, clean it with deionized water, put it in a 100°C oven for 24h under vacuum; weigh 100 parts of cyanate resin and 5 parts of epoxy resin in a three-necked flask, and pre-heat at 155°C. Polymerize for 3.5 hours; put the glue solution in an oven at 100°C, add 100 parts of acetone and 1 part of dibutyltin dilaurate to make a glue solution; dip the treated PBO fiber in glue, wind it, and dry it. The temperature of the glue solution is Prepregs were prepared at room temperature, with a pulling speed of 0.5m / min, and dried at room temperature for 48 hours. Lay the prepreg unidirectionally in the mold, place it on a small flat vulcanizing machine and keep it warm at 120°C for 15 minutes, pressurize at 5MPa, release ...

Embodiment 2

[0019] Example 2: Put 130 parts of PBO fibers into absolute ethanol and soak for 24 hours, clean them with deionized water, then ultrasonically treat them for 30 minutes in an ultrasonic instrument (100W, 25°C), take them out and clean them with deionized water, Put it in an oven at 100°C for 24h in vacuum; then soak it in methanesulfonic acid (60wt%) solution and place it in an ultrasonic instrument (100W, 60°C) for ultrasonic treatment for 6h, take it out and clean it with deionized water, put Vacuum-dried in an oven at 100°C for 24 hours; then soaked in a mixed solution of γ-glycidyl etheroxypropyltrimethoxysilane / absolute ethanol / deionized water (5wt%, pH=9), in an ultrasonic instrument (100W, 60°C) for 6 hours, take it out and clean it with deionized water, put it in a 100°C oven for 24 hours under vacuum; weigh 100 parts of cyanate resin and 5 parts of epoxy resin in a three-necked flask, and place it at 155°C Pre-polymerize at high temperature for 3.5 hours; put the glu...

Embodiment 3

[0021] Example 3: 140 parts of PBO fibers were soaked in absolute ethanol for 24 hours, cleaned with deionized water, ultrasonically treated in an ultrasonic instrument (100W, 25° C.) for 30 minutes, taken out and cleaned with deionized water, Put it in an oven at 100°C for 24h in vacuum; then soak it in methanesulfonic acid (30wt%) solution and place it in an ultrasonic instrument (100W, 60°C) for ultrasonic treatment for 12h, take it out and clean it with deionized water, put Vacuum-dried in an oven at 100°C for 24 hours; then soaked in a mixed solution of γ-glycidyl etheroxypropyl trimethoxysilane / absolute ethanol / deionized water (3wt%, pH=7.5), in an ultrasonic instrument (100W, 60°C) for 12 hours, take it out, clean it with deionized water, put it in a 100°C oven and dry it under vacuum for 24 hours; weigh 100 parts of cyanate resin and 8 parts of epoxy resin in a three-necked flask, and place it at 150°C Pre-polymerize at high temperature for 4 hours; put the glue soluti...

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Abstract

The invention provides a modified PBO fiber/cyanate ester resin wave-transparent composite material and a preparation method thereof. A PBO fiber, high in strength and modulus and low in dielectric constant, is taken as a reinforcement, and a cyanate ester resin modified by an epoxy resin is taken as a substrate. The prepared modified PBO fiber/cyanate ester resin wave-transparent composite material not only is high in bending strength and interlaminar shear strength, but also has multiple characteristics of low dielectric constant and high temperature resistance.

Description

technical field [0001] The invention relates to a composite material, in particular to a modified PBO fiber / cyanate resin wave-transmitting composite material, and also relates to a preparation method of the modified PBO fiber / cyanate ester wave-transmitting composite material. Background technique [0002] The radome can ensure the normal operation of the radar antenna under harsh environmental conditions. In addition to bearing the aerodynamic load, aerodynamic heating and erosion of rain, snow, wind and sand generated during the flight, it must also have excellent microwave permeability. Conventional wave-transparent material resin matrix such as epoxy resin (EP), bismaleimide resin (BMI) and polyimide resin (PI) exist in different degrees or have poor heat and humidity resistance, or microwave dielectric properties Defects such as poor or poor dimensional stability make it difficult to meet the high-performance requirements brought about by the development of new technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L63/00C08J5/24C08J5/06D06M13/513B29C35/02D06M101/30
CPCC08J5/06C08J5/24C08J2379/04C08L79/04C08L2201/08C08L2205/03C08L2205/16C08L63/00
Inventor 顾军渭唐玉生徐爽孔杰孟旭东
Owner NORTHWESTERN POLYTECHNICAL UNIV
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