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A kind of toughened benzoxazine composite material and preparation method thereof

A technology of benzoxazine and toughening modification, which is applied in the field of new functional polymer materials and its preparation, can solve problems such as easy agglomeration, and achieve the effects of simple process, improved interface compatibility, and strong chemical bonding

Active Publication Date: 2017-11-03
四川天策聚材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of inorganic nanoparticles and core-shell rubber in toughening benzoxazine resin is that the particles are easy to agglomerate in the benzoxazine matrix

Method used

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  • A kind of toughened benzoxazine composite material and preparation method thereof
  • A kind of toughened benzoxazine composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Weigh 1 part of graphite powder with a particle size of 30 microns and add it to a reaction flask containing 100 ml of concentrated sulfuric acid. Keep the temperature of the graphite powder-concentrated sulfuric acid reaction system at 5°C. Add 1 part of sodium nitrate (NaNO 3 ) and 6 parts potassium permanganate (KMnO 4 ). After the potassium permanganate and sodium nitrate were completely dissolved, the temperature in the reaction flask was raised to 35°C. After continuing the reaction at a constant temperature for 2 hours, 90 ml of deionized water was slowly added to the reaction flask. After stirring and reacting for 20 minutes, sonicate at room temperature at 40 Hz for 20 minutes, and switch to magnetic stirring. Add 20 ml of 35% hydrogen peroxide dropwise into the reaction bottle to obtain a graphene oxide suspension. The graphene oxide suspension was centrifuged at 10,000 rpm, and the lower sediment was the crude product of graphene oxide. The crude graphe...

Embodiment 2

[0050] Weigh 5 parts of graphite powder with a particle size of 30 microns and add to a reaction flask containing 120 milliliters of concentrated sulfuric acid. Keep the temperature of the graphite powder-concentrated sulfuric acid reaction system at 3°C. Add 0.5 parts of sodium nitrate (NaNO 3 ) and 15 parts potassium permanganate (KMnO 4 ). After the potassium permanganate and sodium nitrate were completely dissolved, the temperature in the reaction flask was raised to 40°C. After continuing the reaction at a constant temperature for 5 hours, slowly add 100 ml of deionized water into the reaction flask. After stirring and reacting for 60 minutes, ultrasonication was performed at room temperature at 40 Hz for 20 minutes, and the stirring was switched to magnetic force. Add 50 ml of 35% hydrogen peroxide dropwise into the reaction bottle to obtain a graphene oxide suspension. The graphene oxide suspension was centrifuged at 10,000 rpm, and the lower sediment was the crude...

Embodiment 3

[0054] Weigh 2 parts of graphite powder with a particle size of 40 microns and add to a reaction flask containing 80 milliliters of concentrated sulfuric acid. Keep the temperature of the graphite powder-concentrated sulfuric acid reaction system at 0°C. Add 1 part of sodium nitrate (NaNO 3 ) and 6 parts potassium permanganate (KMnO 4 ). After the potassium permanganate and sodium nitrate were completely dissolved, the temperature in the reaction flask was raised to 30°C. After continuing the reaction at a constant temperature for 5 hours, 40 ml of deionized water was slowly added to the reaction flask. After stirring and reacting for 30 minutes, sonicate at room temperature at 40 Hz for 20 minutes, and switch to magnetic stirring. Add 40 ml of 35% hydrogen peroxide dropwise into the reaction flask to obtain a graphene oxide suspension. The graphene oxide suspension was centrifuged at 10,000 rpm, and the lower sediment was the crude product of graphene oxide. The crude g...

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Abstract

The invention discloses a toughening type benzoxazine composite and a preparation method thereof. The toughening type benzoxazine composite is prepared by solidifying 75-96 parts of benzoxazine monomers, 3-20 parts of nylon 12 microspheres and 0.1-5 parts of benzoxazine monomer modified graphene oxide at the temperature of 160-200 DEG C. Benzoxazine monomer modified graphene oxide can effectively assist nylon 12 microspheres in uniformly dispersing in a benzoxazine resin matrix and thereby playing a role in synergistic toughening. The toughening type benzoxazine composite has high breaking tenacity, high Young modulus and high tensile strength. The toughening type benzoxazine composite can be widely applied to occasions with high requirements for the material toughness.

Description

technical field [0001] The invention relates to a toughened benzoxazine-composite material and a preparation method thereof, belonging to the field of novel functional polymer materials and the preparation thereof. Background technique [0002] The benzoxazine monomer (Ba) is a nitrogen-oxygen six-membered heterocyclic compound prepared from primary amine, phenol, paraformaldehyde or formaldehyde through Mannich reaction. Ba has flexible molecular design, and benzoxazine monomers with different structures can be prepared by changing the types of primary amines and phenols (US20110112235; Handbook of benzoxazine resins. Elsevier, 2011:3-4.). Under the action of heating or a catalyst, Ba undergoes ring-opening polymerization to form a benzoxazine resin (PBa) with a structure similar to that of a phenolic resin. There is no release of small molecules during the ring-opening polymerization process, the shrinkage rate of the resin is almost zero, and the size of the product is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/04C08L77/02C08K9/02C08K9/06C08K9/04C08K3/04C08K7/24C08G73/06
CPCC08G73/06C08K2201/003C08L79/04C08L2205/18C08L77/02C08K9/02C08K9/06C08K9/04C08K9/08C08K3/04C08K7/24
Inventor 赵春霞李云涛苏皇宇
Owner 四川天策聚材科技有限公司
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