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Polyimide-based traction belt

A polyimide-based traction and polyimide resin technology, applied in the field of traction belts, can solve the problems of solvent resistance, poor mechanical properties and environmental adaptability, and low heat resistance level

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

[0004] Traditional composite traction belts generally use general-purpose engineering plastics as the resin matrix. General-purpose engineering plastics have problems such as solvent resistance, low heat resistance, poor mechanical properties and environmental adaptability.
Moreover, there are few composite traction belts resistant to radiation at present, which limits the application of composite traction belts in high-tech fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0154] (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%.

[0155] 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

[0163] (1) 62.07g (0.50mol) 3-methoxyphenol, 101.0g (0.50mol) m-bromonitrobenzene, 4.76g (0.025mol) cuprous iodide, 76.02g (0.55mol) potassium carbonate and 200g Add N,N-dimethylformamide to the reaction flask in turn, heat the reaction system to 150°C for 12 hours under the protection of nitrogen, and react for 12 hours; after cooling to 60°C, add it to 2000mL water, precipitate the crude product, filter it out, wash with water and dissolve Dry in dichloromethane and anhydrous magnesium sulfate, concentrate the solvent, and purify to obtain 90.59 g of the refined product of compound (II-2) represented by formula (II); the yield is 73.9%.

[0164] (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) -2) Sequentially add to the reactor, stir and react at 20°C for 18h; then slowly add to ice-hydrochloric acid for treatment, separate liquid, dry over anhydrou...

Embodiment 3

[0168] (1) Refer to Step (1) of Preliminary Example 2 to obtain the refined product of compound (II-2) shown in formula (II).

[0169] (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-2) 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, liquid separation, drying over anhydrous magnesium sulfate, and concentration of the solvent to obtain a crude product. Recrystallization obtained 22.98 g of refined product of compound (III-4) represented by formula (III); the yield was 64.7%.

[0170](3) 39.43g (0.1mol) of the structural compound (III-4) shown in formula (III), 101.15g (40%, 0.5mol) of hydrobromic acid and 350g of acetic acid were added to the reactor successively, at 100°C Stir the reaction for 48 hours; concentrate and recover hydrobromic acid and acetic acid,...

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Abstract

The invention provides a polyimide-based traction belt which is prepared by the following method: leading out and uniformly expanding untwisted continuous fibers, preheating the fibers, fully impregnating the untwisted continuous fibers with polyimide resin, and shaping to obtain the polyimide-based traction belt; wherein the polyimide resin is prepared by the following method: polymerizing aromatic dianhydride, aromatic diamine and an end-capping reagent in an organic solvent to obtain a polyamide acid solution; adding non-polar aromatic hydrocarbon into the polyamide acid solution, carryingout heating cyclization dehydration, separating out powder, and washing, drying and granulating the powder to obtain polyimide resin; wherein the aromatic diamine is selected from any one or more of structures shown in formulas V-1 to V-8. The traction belt has high mechanical properties such as tensile strength, has excellent ray irradiation resistance; and also has the excellent properties of small specific gravity, high temperature resistance grade, long service life, low thermal expansion coefficient, low vacuum environment volatile matter content and the like. The polyimide-based tractionbelt can be applied to the fields of aviation, spaceflight, nuclear industry, civil traction and the like.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 201910610423.8 and the title of the invention "a polyimide-based traction belt" submitted to the China Patent Office on July 08, 2019, the entire contents of which are incorporated herein by reference In this application. technical field [0002] The invention belongs to the technical field of traction belts, in particular to a polyimide-based traction belt. Background technique [0003] Composite traction belt refers to the traction material composed of fiber and resin. Due to its advantages of flexibility, light weight and high tensile strength, it plays an important role in traction and load bearing, and is widely used in military industry, construction, production and other fields. Commonly used resins include epoxy resin, polyester resin, polypropylene resin, polysulfone resin, polyimide resin, etc. Among them, polyimide resin is a kind of high-performance resin con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K7/06C08K7/14C08G73/10
CPCC08G73/1042C08G73/1071C08K7/06C08K7/14C08L79/08C08L2205/025C08L2205/16
Inventor 矫龙代学民杜志军姚海波王汉夫邱雪鹏
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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