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Nomex containing 2,4-bis(4-phenoxyphenyl)chinazolin-1-ketone structure and preparation method thereof

A technology of phenoxyphenyl and phthalazine, which is applied in the field of polymer science, can solve the problems of equipment corrosion environment, difficult processing, high cost, etc., and achieve good mechanical properties, excellent heat resistance stability, and broad application prospects Effect

Inactive Publication Date: 2010-06-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rigidity of the molecular backbone and strong intermolecular forces, traditional polyarylamides are neither molten nor soluble in organic solvents, resulting in difficult processing and limiting their applications.
Taking commercial para-aramid fiber PPTA as an example, it can only be processed by spinning in concentrated sulfuric acid, which leads to high cost and problems such as equipment corrosion and environmental pollution.

Method used

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  • Nomex containing 2,4-bis(4-phenoxyphenyl)chinazolin-1-ketone structure and preparation method thereof
  • Nomex containing 2,4-bis(4-phenoxyphenyl)chinazolin-1-ketone structure and preparation method thereof
  • Nomex containing 2,4-bis(4-phenoxyphenyl)chinazolin-1-ketone structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In a three-necked flask equipped with a stirrer, an ice-water bath, and a nitrogen inlet and outlet, sequentially add 4 mmol of 2,4-bis(4-(4-aminophenoxy)phenyl)naphthyridine-1-one, 4.0 mmol p-phenylenediamine, 0.375g of anhydrous lithium chloride, 27ml of N-methylpyrrolidone and an appropriate amount of pyridine, stirred to dissolve them all, then added 8mmol of terephthaloyl chloride while stirring, under nitrogen protection at 0 ℃ reaction, after 10 minutes, the viscosity of the reaction system increased significantly, and there was an obvious rod climbing phenomenon. After reacting for 6 hours, the reaction product was settled in 400ml of ethanol and water (1:1) to obtain a white blocky copolymer, which was filtered and fully washed with hot water, and the polymer was vacuum-dried at 120°C for 24 hours to obtain a poly Aramid resin. The polymer was dissolved in 98% concentrated sulfuric acid, and the intrinsic viscosity was measured with an Ubbelohde viscometer to ...

Embodiment 2

[0041] In a three-necked flask equipped with a stirrer, an ice-water bath, and a nitrogen inlet and outlet, successively add 3 mmol of 2,4-bis(4-(4-aminophenoxy)phenyl)naphthyridine-1-one, 1 mmol of 4,4'-diaminodiphenyl ether, 4.0mmol of p-phenylenediamine, 0.375g of anhydrous lithium chloride, 27ml of N-methylpyrrolidone and an appropriate amount of pyridine, stirred to dissolve them all, and then added 8mmol while stirring Terephthaloyl chloride was reacted at 0°C under the protection of nitrogen, and the system had obvious rod climbing phenomenon, and the viscosity of the reaction system increased significantly after 10 minutes. After reacting for 6 hours, the reaction product was precipitated in 400ml of ethanol and water (1:1) to obtain a white blocky copolymer, which was filtered and washed thoroughly with hot water, and the polymer was vacuum-dried at 120°C for 24 hours to obtain pure Copolyaramid resins. The polymer was dissolved in 98% concentrated sulfuric acid, and...

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Abstract

The invention discloses a nomex containing a 2,4-bis(4-phenoxyphenyl)chinazolin-1-ketone structure and a preparation method thereof. The structure expression of the polymer is as following: taking bisacyl chloride and aromatic diamine as the polycondensation monomer, adopting the solution polycondensation, thereby being capable of preparing the HMW nomex containing the 2,4-bis(4-phenoxyphenyl)chinazolin-1-ketone structure. Since a distorted and non-coplanar structure is led into the molecule main chain, the nomex has favorable dissolubility and excellent heat resistance, and can be processed and shaped by adopting a plurality of patterns. The nomex resin has wide application prospect in the field of high-temperature resistance fibre, composite materials, films, lacquers, paints, adhesion agents and the like.

Description

technical field [0001] The invention belongs to the field of polymer science and technology, relates to a high-performance polymer material and a preparation method thereof, in particular to a class of 2,4-bis(4-phenoxyphenyl)phthalazin-1-one structure Polyarylamides and methods for their preparation. Background technique [0002] Polyaramid is a class of engineering plastics with excellent comprehensive properties, represented by polyparaphenylene terephthalamide (PPTA, also known as aramid 1414), because of its excellent thermal stability, chemical resistance and It is widely used in aerospace, electronics, machinery and many other fields due to its outstanding mechanical properties. However, due to the rigidity of the molecular backbone and strong intermolecular forces, traditional polyarylamides are neither molten nor soluble in organic solvents, resulting in processing difficulties and limiting their applications. Taking the commercialized para-aramid fiber PPTA as an...

Claims

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Application Information

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IPC IPC(8): C08G69/32
Inventor 蹇锡高刘程王锦艳张守海廖功雄
Owner DALIAN UNIV OF TECH
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