Toughening type benzoxazine composite 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: 2015-12-30
四川天策聚材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem of inorganic nanoparticles and core-shell rubber in toughening benzoxa

Method used

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  • Toughening type benzoxazine composite and preparation method thereof
  • Toughening type benzoxazine composite and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0043] Example 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. While magnetically stirring, add 1 part of sodium nitrate (NaNO 3 ) And 6 parts of potassium permanganate (KMnO 4 ). After potassium permanganate and sodium nitrate are completely dissolved, the temperature in the reaction flask is increased to 35°C. After the reaction was continued at a constant temperature for 2 hours, 90 ml of deionized water was slowly added to the reaction flask. After the reaction was stirred for 20 minutes, the reaction was sonicated at 40 Hz at room temperature for 20 minutes, and then switched to magnetic stirring. 20 ml of hydrogen peroxide with a concentration of 35% was added dropwise to the reaction flask to obtain a graphene oxide suspension. The graphene oxide suspension was centr...

Example Embodiment

[0049] Example 2:

[0050] Weigh 5 parts of graphite powder with a particle size of 30 microns and add them to a reaction flask containing 120 ml of concentrated sulfuric acid. Keep the temperature of the graphite powder-concentrated sulfuric acid reaction system at 3°C. While magnetically stirring, add 0.5 part of sodium nitrate (NaNO 3 ) And 15 parts of potassium permanganate (KMnO 4 ). After potassium permanganate and sodium nitrate are completely dissolved, the temperature in the reaction flask is increased to 40°C. After the reaction was continued for 5 hours at a constant temperature, 100 ml of deionized water was slowly added to the reaction flask. After the reaction was stirred for 60 minutes, the reaction was carried out at room temperature at 40 Hz ultrasonic for 20 minutes, and the magnetic stirring was switched. Add 50 ml of hydrogen peroxide with a concentration of 35% dropwise to the reaction flask to obtain a graphene oxide suspension. The graphene oxide suspen...

Example Embodiment

[0053] Example 3:

[0054] Weigh 2 parts of graphite powder with a particle size of 40 microns and add them to a reaction flask containing 80 ml of concentrated sulfuric acid. Keep the temperature of the graphite powder-concentrated sulfuric acid reaction system at 0°C. While magnetically stirring, add 1 part of sodium nitrate (NaNO 3 ) And 6 parts of potassium permanganate (KMnO 4 ). After potassium permanganate and sodium nitrate were completely dissolved, the temperature in the reaction flask was increased to 30°C. After the reaction was continued for 5 hours at a constant temperature, 40 ml of deionized water was slowly added to the reaction flask. After the reaction was stirred for 30 minutes, the reaction was carried out at room temperature 40 Hz ultrasonic for 20 minutes, and then it was switched to magnetic stirring. 40 ml of hydrogen peroxide with a concentration of 35% was dropped into the reaction flask to obtain a graphene oxide suspension. The graphene oxide susp...

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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; Handbookofbenzoxazineresins.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 stabl...

Claims

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Application Information

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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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