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Epoxy-terminated fluorine-containing hyperbranched structure interfacial compatibilizer, preparation method thereof, wave-transparent composite material and preparation method of composite material

A technology of interfacial compatibilizer and epoxy end group, which is applied in the field of wave-transparent composite materials and its preparation, epoxy end group fluorine-containing hyperbranched structure interface compatibilizer and its preparation field, can solve the problem of cyanate ester and Problems such as low interface compatibility of PBO system

Active Publication Date: 2021-06-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are still few works on the interfacial compatibility of cyanate esters and PBO systems in the prior art

Method used

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  • Epoxy-terminated fluorine-containing hyperbranched structure interfacial compatibilizer, preparation method thereof, wave-transparent composite material and preparation method of composite material
  • Epoxy-terminated fluorine-containing hyperbranched structure interfacial compatibilizer, preparation method thereof, wave-transparent composite material and preparation method of composite material
  • Epoxy-terminated fluorine-containing hyperbranched structure interfacial compatibilizer, preparation method thereof, wave-transparent composite material and preparation method of composite material

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preparation example Construction

[0044] The present invention also provides a preparation method of the epoxy-terminated fluorine-containing hyperbranched structure interfacial compatibilizer described in the above technical scheme, comprising the following steps:

[0045] Mix tert-butyldimethylsilyl chloride, 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane, the first triethylamine and the first organic solvent, and carry out a silyl group protection reaction to obtain silane Base protection reaction solution;

[0046] Adding trimesoyl chloride dropwise into the silane-based protection reaction solution to carry out polycondensation reaction to obtain a polycondensation reaction solution;

[0047] The polycondensation reaction liquid is sequentially mixed with the second triethylamine and glycidol, and the end group modification reaction is carried out to obtain the epoxy end group fluorine-containing hyperbranched structure interface compatibilizer.

[0048] In the present invention, unless otherwise spec...

Embodiment 1

[0083] Under argon atmosphere, 0.75 parts by weight of tert-butyldimethylsilyl chloride, 0.36 parts by weight of 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane and 0.5 parts by weight of triethylamine Add it into a round bottom flask, then add 6 parts by weight of N-methylpyrrolidone and stir evenly. The mixed solution was bubbled with argon gas for 40 min, and then the reaction system was sealed. Then, the round bottom flask was placed in a constant temperature oil bath at 25°C, and the reaction was continued for 24h. Afterwards, 0.27 parts by weight of trimesoyl chloride was dissolved in 6 parts by weight of N-methylpyrrolidone, and it was dropped into the above-mentioned reaction system under conditions of argon and ice bath (the dropping speed was 60 drops / minute) , continue to react for 24h. Then add 0.2 parts by weight of triethylamine to the above reaction system, stir at 1200r / min for 3 hours, then add 0.2 parts by weight of glycidol (GI), and continue to react a...

Embodiment 2

[0090] Under argon atmosphere, 0.77 parts by weight of tert-butyldimethylsilyl chloride, 0.35 parts by weight of 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane and 0.6 parts by weight of triethylamine Add it into a round bottom flask, then add 5 parts by weight of N-methylpyrrolidone and stir evenly. The mixed solution was bubbled with argon gas for 40 min, and then the reaction system was sealed. Then, the round bottom flask was placed in a constant temperature oil bath at 25°C, and the reaction was continued for 24h. Afterwards, 0.27 parts by weight of trimesoyl chloride was dissolved in 7 parts by weight of N-methylpyrrolidone, and it was added dropwise (with a drop rate of 50 drops / minute) into the above reaction system under argon and ice bath conditions. , continue to react for 24h. Then add 0.3 parts by weight of triethylamine to the above reaction system, stir at 1000r / min for 3 hours, then add 0.2 parts by weight of glycidol (GI), and continue to react at 25°C f...

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Abstract

The invention provides an epoxy-terminated fluorine-containing hyperbranched structure interface compatilizer, a preparation method thereof, a wave-transparent composite material and a preparation method of the composite material, and belongs to the technical field of composite material preparation. The epoxy-terminated fluorine-containing hyperbranched structure interface compatilizer provided by the invention is a hyperbranched polymer molecule, and an epoxy group of the hyperbranched polymer molecule can be subjected to a copolymerization reaction with a -OCN group in cyanate ester resin, so that the distance between cross-linking points is increased, and the mechanical property of the cyanate ester resin is improved. The introduction of a fluorine-containing group can effectively reduce the molecular polarizability of the cyanate ester resin, thereby improving the dielectric properties of the cured cyanate ester resin. Therefore, through the epoxy-terminated fluorine-containing hyperbranched structure interface compatibilizer, a topological structure of a fluorine-containing group, an epoxy terminated group, a PBO-like structure and a special hyperbranched molecule can be introduced into a curing network of the cyanate resin, so that the mechanical property, the dielectric property and the insulating property of a PBO fiber / cyanate resin wave-transparent composite material are synchronously improved.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to an epoxy terminal group fluorine-containing hyperbranched structure interface compatibilizer and a preparation method thereof, a wave-transmitting composite material and a preparation method thereof. Background technique [0002] Cyanate ester (CE) resin has excellent dielectric properties (ε, 2.8-3.2), good heat resistance and dimensional stability, and is recognized as the best candidate matrix material for the next generation of resin-based wave-transparent composite materials one. However, the highly cross-linked triazine ring structure makes CE resin cured products more brittle, and their mechanical properties are not ideal, and their dielectric properties are still far from the application requirements of high-performance broadband resin-based wave-transparent composite materials. [0003] Poly(p-phenylenebenzobisoxazole) (PBO) fibers have a relative...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08G59/02C08L79/04C08L63/00
CPCC08G83/006C08G83/005C08G59/02C08G59/022C08L79/04C08L2205/025C08L2205/16C08L101/005C08L63/00
Inventor 顾军渭刘政唐玉生孔杰唐林
Owner NORTHWESTERN POLYTECHNICAL UNIV