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SiO2-containing benzoxazine/bismaleimide resin composite material and preparation method thereof

A technology of maleimide resin and benzoxazine is applied in the field of benzoxazine/bismaleimide resin composite material and preparation thereof, and can solve the problem of poor molding processability, high brittleness of cured product, and high curing temperature. Advanced problems, to achieve the effect of good combination, simple and convenient preparation process, and improved comprehensive performance

Active Publication Date: 2019-06-11
XIAN UNVERSITY OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while bismaleimide resin has excellent performance, it also has disadvantages such as high brittleness of the cured product, high curing temperature and poor molding process, which are limited in the actual application process.

Method used

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  • SiO2-containing benzoxazine/bismaleimide resin composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A SiO 2 The benzoxazine / bismaleimide resin composite material consists of the following raw materials in parts by weight: 1 part contains SiO 2 benzoxazine monomer, 100 parts of diphenylmethane bismaleimide and 10 parts of allyl ether.

[0035] The above containing SiO 2 The preparation method of benzoxazine / bismaleimide resin composite material, it comprises the steps:

[0036] (1) Contains SiO 2 Preparation of benzoxazine monomers:

[0037] Organic-inorganic hybrid SiO with amino groups at the end 2 Mix it with paraformaldehyde with a degree of polymerization of 8 at a molar ratio of 1:2, pour the mixed solution into a 250mL three-neck flask with a magnet and a condensing reflux tube, set the device on a magnetic stirring electric heating mantle, and install it , start stirring, and raise the temperature to 35°C, stir for 2h; then add phenol, wherein the molar ratio of phenol to paraformaldehyde with a degree of polymerization of 8 is 1:2, then heat up to 120°C, ...

Embodiment 2

[0047] A SiO 2 The benzoxazine / bismaleimide resin composite material consists of the following raw materials in parts by weight: 5 parts containing SiO 2 benzoxazine monomer, 100 parts diphenylmethane bismaleimide and 50 parts allyl ether.

[0048] The above containing SiO 2 The preparation method of benzoxazine / bismaleimide resin composite material, it comprises the steps:

[0049] (1) Contains SiO 2 Preparation of benzoxazine monomers:

[0050] Organic-inorganic hybrid SiO with amino groups at the end 2 Mix it with paraformaldehyde with a degree of polymerization of 20 at a molar ratio of 1:2, pour the mixed solution into a 250mL three-neck flask with a magnet and a condensing reflux tube, set the device on a magnetic stirring electric heating mantle, and install it , start stirring, and raise the temperature to 40°C, stir and react for 1.5h; then add phenol, wherein the molar ratio of phenol to paraformaldehyde with a degree of polymerization of 20 is 1:2, then heat up...

Embodiment 3

[0060] A SiO 2 The benzoxazine / bismaleimide resin composite material consists of the following raw materials in parts by weight: 10 parts containing SiO 2 benzoxazine monomer, 100 parts diphenylmethane bismaleimide and 100 parts allyl ether.

[0061] The above containing SiO 2 The preparation method of benzoxazine / bismaleimide resin composite material, it comprises the steps:

[0062] (1) Contains SiO 2 Preparation of benzoxazine monomers:

[0063] Organic-inorganic hybrid SiO with amino groups at the end 2 Mix with paraformaldehyde with a degree of polymerization of 50 at a molar ratio of 1:2, pour the mixture into a 250mL three-neck flask with a magnet and a condensing reflux tube, and set the device on a magnetic stirring electric heating mantle. After installation , start stirring, and raise the temperature to 45°C, stir and react for 1h; then add phenol, wherein the molar ratio of phenol to paraformaldehyde with a degree of polymerization of 50 is 1:2, then heat up t...

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Abstract

The invention belongs to the technical field of composite material science, and discloses a SiO2-containing benzoxazine / bismaleimide resin composite material and a preparation method thereof. A sol-gel method is used to prepare an organic-inorganic hybrid nano-SiO2 containing an amino group at the end, and the organic-inorganic hybrid nano-SiO2 containing the amino group is taken as an ammonia source for synthesizing a benzoxazine monomer containing SiO2 in the molecular structure, and then the benzoxazine monomer containing SiO2 is used for modifying a bismaleimide prepolymer, so that a bismaleimide resin high-heat-resistance super-wear-resistance composite material with good mechanical strength, excellent heat resistance and excellent wear resistance and damage resistance is prepared. The preparation method of the invention has a simple process and effectively solves the problems of poor molding processability, high brittleness of a cured product and high curing temperature of the bismaleimide resin; and the prepared composite material has good mechanical properties, heat resistance, wear resistance and damage resistance.

Description

technical field [0001] The invention belongs to the field of composite material science and technology, in particular to a SiO-containing 2 The benzoxazine / bismaleimide resin composite material and its preparation method. Background technique [0002] Nano silicon dioxide (SiO 2 ) as a good inorganic nano-material, has the characteristics of non-toxic, odorless, non-polluting, anti-aging, anti-ultraviolet, and chemical resistance, and has a wide range of applications in resin modification. In addition, SiO 2 It has ultra-fine nanoscale, and its size ranges from 1nm to 100nm, thus exhibiting many unique properties, such as small size effect, surface effect and macroscopic quantum medicine effect. In traditional industrial production, SiO 2 It is mostly prepared by gas phase method and precipitation method. SiO prepared by gas phase method 2 The particle size is smaller, the effective amount is higher, and the structure is tighter, but the compatibility with organic resi...

Claims

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Application Information

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IPC IPC(8): C08L39/00C08L61/34C08K9/04C08K3/36C08F222/40C08F216/12C08G14/06
Inventor 刘振贾园娄珀瑜杨菊香杜威
Owner XIAN UNVERSITY OF ARTS & SCI
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