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Corrosion-resistant polyarylester composite material and preparation method thereof

A composite material and polyarylate technology, applied in the field of corrosion-resistant polyarylate composite material and its preparation, can solve the problems of molecular main chain damage, change of resin molecular structure, low melt viscosity, etc.

Active Publication Date: 2021-08-27
YANGZHOU TECHIA MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Referring to the formula of a polyarylate plastic disclosed in Chinese patent CN104327468A, the raw materials include polyarylate plastic and additives, and the additives include barium sulfate, methyl methacrylate, phthalate, polyoxyethylene ether, suberic acid , xylene, carbon fiber, rosin glyceride, aminopropyltriethoxysilane, the polyarylate plastic has the characteristics of low melt viscosity, good fluidity, good compatibility, stable product performance, no harmful substances, and can be degraded It is environmentally friendly and safe, and is stable to general organic medicines and oils. It can also withstand common dilute acids, but it is not resistant to concentrated acids and alkalis such as ammonia water and concentrated sulfuric acid. It will chemically react with resins when exposed to acidic or alkaline solutions for a long time. The molecular structure of the resin causes the main chain of the molecule to be damaged or broken, which affects its service life. Therefore, it is necessary to develop a corrosion-resistant polyarylate composite material to solve the above problems

Method used

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  • Corrosion-resistant polyarylester composite material and preparation method thereof
  • Corrosion-resistant polyarylester composite material and preparation method thereof
  • Corrosion-resistant polyarylester composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Modified polyarylate monomer is prepared by the following steps:

[0043] Step S1, add 0.02mol 2,2-bis-(4-hydroxyphenyl)hexafluoropropane, 0.04mol 2-chloro-5-nitrobenzotrifluoride and 25mL DMF to the three-necked flask, stir to dissolve, then add 0.035mol Potassium carbonate was heated up to 110°C for 5 hours, suction filtered while it was hot, the filtrate was poured into a methanol solution with a mass fraction of 70% to precipitate, filtered, the filter cake was washed with methanol, and then dried at 60°C for 3 hours to obtain intermediate 1;

[0044] Step S2, add 0.010 mol of intermediate 1, 40 mL of absolute ethanol, and 0.10 g of Pd / C catalyst to the three-necked flask, ultrasonically disperse at a frequency of 30 kHz for 20 min, raise the temperature to 105 ° C, add 2.2 mL of hydrazine hydrate to it, and control the dropwise within 30 min After the addition was completed, the reflux reaction was continued for 3 h, suction filtered while hot, the filtrate was pour...

Embodiment 2

[0050] Modified polyarylate monomer is prepared by the following steps:

[0051] Step S1, add 0.025mol 2,2-bis-(4-hydroxyphenyl)hexafluoropropane, 0.042mol 2-chloro-5-nitrobenzotrifluoride and 26mL DMF to the three-necked flask, stir and dissolve, then add 0.036mol Potassium carbonate was heated to 115°C for 5 hours, suction filtered while it was hot, the filtrate was poured into a methanol solution with a mass fraction of 70% to precipitate, filtered, the filter cake was washed with methanol, and dried at 65°C for 3 hours to obtain intermediate 1;

[0052] Step S2, add 0.011mol of intermediate 1, 43mL of absolute ethanol, and 0.12g of Pd / C catalyst to the three-necked flask, ultrasonically disperse at a frequency of 35kHz for 25min, raise the temperature to 108°C, add 2.4mL of hydrazine hydrate to it, and control the dropwise within 30min After the addition was completed, the reflux reaction was continued for 3 h, suction filtered while hot, the filtrate was poured into deion...

Embodiment 3

[0058] Modified polyarylate monomer is prepared by the following steps:

[0059] Step S1, add 0.03mol 2,2-bis-(4-hydroxyphenyl)hexafluoropropane, 0.045mol 2-chloro-5-nitrobenzotrifluoride and 28mL DMF to the three-necked flask, stir and dissolve, then add 0.037mol Potassium carbonate was heated up to 120°C for 6 hours, suction filtered while it was hot, the filtrate was poured into a methanol solution with a mass fraction of 70% to precipitate, filtered, the filter cake was washed with methanol, and dried at 70°C for 4 hours to obtain intermediate 1;

[0060] Step S2, add 0.012mol of intermediate 1, 45mL of absolute ethanol, and 0.14g of Pd / C catalyst to the three-necked flask, ultrasonically disperse at a frequency of 40kHz for 30min, raise the temperature to 110°C, add 2.5mL of hydrazine hydrate to it, and control the dripping within 30min After the addition was completed, the reflux reaction was continued for 4 hours, suction filtered while it was hot, the filtrate was pour...

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Abstract

The invention discloses a corrosion-resistant polyarylester composite material, belongs to the technical field of high polymer materials, and aims to solve the problem that polyarylester is not resistant to concentrated acid and concentrated alkali such as ammonia water and concentrated sulfuric acid. The polyarylester composite material is prepared from the following raw materials in parts by weight: 22 to 34 parts of modified polyarylester monomer, 15 to 20 parts of modified epoxy resin and 1 to 3 parts of antioxidant, the invention also discloses a preparation method of the polyarylester composite material, which comprises the following steps: heating the modified epoxy resin to 150 DEG C, adding the modified polyarylester monomer and the antioxidant, pouring into a preheated mold, and curing in a drying oven after bubbles are eliminated to obtain the polyarylester composite material. The introduction of trifluoromethyl reduces the regularity and orderliness of polymer molecule main chain arrangement, facilitates the co-curing reaction of the modified polyarylester monomer and other polymers, improves the processability of the polyarylester monomer, can improve the hydrophobic property of a base material, reduces the moisture absorption performance of the base material, and endows the base material with excellent corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a corrosion-resistant polyarylate composite material and a preparation method thereof. Background technique [0002] Polyarylate, also known as aromatic polyester, its English name is Polyarylate, referred to as PAR, is a kind of good heat resistance, wide use temperature, can be used for a long time at -70 to 180 ℃, good flame retardancy Thermoplastic engineering plastics. [0003] The softening temperature of polyarylate is far from the thermal decomposition temperature, so the processing methods of heating and melting such as injection, extrusion and blow molding can be conveniently used. It has excellent mechanical and electrical properties, outstanding impact resistance and resilience. Its good characteristics determine a wide range of uses, such as aerospace, communication engineering, electronic appliances, automobiles, machinery and other fields. Referring to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L63/00C08G63/685C08G63/78
CPCC08L67/02C08G63/6856C08G63/78C08L63/00
Inventor 吕嘉木王跃彪柳义波张科明
Owner YANGZHOU TECHIA MATERIAL CO LTD
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