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Polyimide composite foam precursor powder and polyimide composite foam

A polyimide and syntactic foam technology, applied in the field of polyimide syntactic foam precursor powder and polyimide syntactic foam, can solve the problem of poor mechanical properties of syntactic foam, less research on syntactic foam, and limitation of syntactic foam application, etc.

Active Publication Date: 2020-01-21
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The resin matrix mainly used in the microsphere composite foam prepared by the prior art is polypropylene resin, epoxy resin, cyanate resin, etc., and the mechanical properties of the composite foam prepared by it are not good; Less research limits the application of syntactic foams in high-tech fields

Method used

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  • Polyimide composite foam precursor powder and polyimide composite foam
  • Polyimide composite foam precursor powder and polyimide composite foam
  • Polyimide composite foam precursor powder and polyimide composite foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] (1) Add 69.52g (0.56mol) of 3-methoxyphenol, 88.23g (0.56mol) of p-nitrochlorobenzene, 85.14g (0.616mol) of potassium carbonate and 200g of dimethyl sulfoxide into the reactor in sequence , heated to 160°C and reacted for 6h; cooled to 60°C, added to 2000mL water, precipitated crude product, filtered out, dissolved in dichloromethane after washing, dried over anhydrous magnesium sulfate, concentrated solvent, obtained crude product again, and re- Crystallization obtained 114.23 g of the refined product of compound (II-1) represented by formula (II); the yield was 83.2%.

[0136] Utilize nuclear magnetic resonance to characterize the structural compound (II-1) shown in the formula (II) that obtains, the proton nuclear magnetic resonance spectrum result that obtains is: 1 H NMR (400MHz, DMSO) δ = 8.280–8.205 (m, 2H), 7.389 (t, J = 8.2Hz, 1H), 7.170–7.095 (m, 2H), 6.875 (dd, J = 8.3Hz, 2.2Hz , 1H), 6.776(t, J=2.2Hz, 1H), 6.731(dd, J=8.0Hz, 2.0Hz, 1H), 3.765(s, 3H).

[01...

Embodiment 2

[0144] (1) Referring to step (1) of Preliminary Example 1, the refined product of the compound (II-1) shown in formula (II) was obtained.

[0145] (2) 18.56g (0.1mol) 3-nitrobenzoyl chloride, 14.67g (0.11mol) aluminum trichloride, 250g 1,2-dichloroethane and 22.07g (0.09mol) formula (II) Compounds (II-1) showing the structure were sequentially added into the reactor, stirred and reacted at 20°C for 30 h; then slowly added to ice-hydrochloric acid for treatment, separated, dried over anhydrous magnesium sulfate, and concentrated solvent to obtain a crude product, which was subjected to Recrystallization obtained 21.02 g of refined product of compound (III-3) represented by formula (III); the yield was 59.2%.

[0146] Utilize nuclear magnetic resonance to characterize the structural compound (III-3) shown in the formula (III) that obtains, the proton nuclear magnetic resonance spectrum result that obtains is: 1 H NMR (400MHz, DMSO) δ=8.490(d, J=8.0Hz, 1H), 8.425(s, 1H), 8.312(d...

Embodiment 3

[0152] (1) Add 69.52g (0.56mol) of 4-methoxyphenol, 88.23g (0.56mol) of p-nitrochlorobenzene, 85.14g (0.616mol) of potassium carbonate and 200g of dimethyl sulfoxide into the reactor in sequence , heated to 160°C and reacted for 6h; cooled to 60°C, added to 2000mL water, precipitated crude product, filtered out, dissolved in dichloromethane after washing, dried over anhydrous magnesium sulfate, concentrated solvent, obtained crude product again, and re- Crystallization obtained 117.56 g of a refined product of compound (II-3) represented by formula (II); the yield was 85.6%.

[0153] (2) 89.07g (0.48mol) 4-nitrobenzoyl chloride, 69.34g (0.52mol) aluminum trichloride, 1000mL dichloromethane and 105.45g (0.43mol) structure compound (II) shown in formula (II) -3) Added to the reactor in turn, stirred and reacted at 30°C for 15h; then slowly added to ice-hydrochloric acid for treatment, separated liquid, dried over anhydrous magnesium sulfate, concentrated the solvent to obtain a ...

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Abstract

The invention provides polyimide composite foam precursor powder and polyimide composite foam. The polyimide composite foam is prepared by the following method: polymerizing aromatic dianhydride, aromatic diamine and an end-capping reagent in an organic solvent; mixing the obtained polyamide acid solution with non-polar aromatic hydrocarbon and hollow microspheres, performing cyclization dehydration, separating out powder, and washing and drying to obtain polyimide composite foam precursor powder; and performing compression molding to prepare the polyimide composite foam. Polyimide matrix resin is prepared from aromatic diamine of a V-1 - V-8 structure and other polymeric monomers, an o-hydroxybenzophenone structural unit is introduced into a polyimide molecular chain, a hydrogen bond is formed in the polyimide molecular chain, the interface bonding capacity with hollow microspheres is enhanced, and the mechanical performance of the composite foam is effectively improved; the structureenables the composite foam to have excellent ray irradiation resistance.

Description

[0001] This application claims the priority of a Chinese patent application submitted to the China Patent Office on July 08, 2019 with the application number 201910609959.8 and the title of the invention "a polyimide composite foam precursor powder and polyimide composite foam" , the entire contents of which are incorporated in this application by reference. technical field [0002] The invention belongs to the technical field of microsphere composite foam, and in particular relates to a polyimide composite foam precursor powder and polyimide composite foam. Background technique [0003] Microsphere composite foam refers to a foam material composed of a resin matrix and hollow microspheres. This type of material has excellent properties such as low density, high specific strength, and low dielectric constant, and has been widely used in many fields. Commonly used resin matrices include epoxy resins, cyanate resins, phenolic resins, polyimide resins, and the like. Among them...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08L79/08C08K7/28C08K7/24C08J9/00
CPCC08G73/1042C08G73/1071C08J9/0066C08J2379/08C08J2479/08
Inventor 矫龙董志鑫姚海波代学民杜志军邱雪鹏
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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