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Date of Publication:2022-10-10

Journal:中国材料进展

Affiliation of Author(s):化工学院

Volume:31

Issue:2

Page Number:16-23

ISSN No.:1674-3962

Abstract:Herein, we reported the synthesis and properties of poly（phthalazinone ether sulfone ketone）, poly（ phthalazi ether nitrile sulfone ketone） and poly（ phthalazinone ether phenyl-s-triazine）, and their typical applications in polymer matrix composites, insulation varnish, insulation enameled wire, functional coating and functional membrane. Starting from the molecular structure design, a novel monomer, 4-（4-hydroxyl phenyl）-2, 3-phthalazin-l-one （DHPZ） , having unsymmetrical nature, twisted and noncoplanar conformation, has been designed and synthesized. This monomer behaves like bisphenol and can react with activated dihalo compounds to produce high molecular weight phthalazinone-containing poly（ aryl ether）s through classical nucleophilic aromatic substitution reactions. These polymers containing phthalazinone moieties as a new important family of high-performance polymers possess an outstanding balance of mechanical properties and processability along with excellent thermooxidative stability and reasonable solubility in several organic solvents, such as N-methyl pyrrolidione （NMP） , N, N-dimethyl acetamide （DMAc） and chloroform. Their glass transition temperatures are in the range of 250 to 375 ~C, detected by differential scanning calorimetry （DSC） and their temperatures of 5% weight loss under nitrogen are higher than 500 ℃, measured by thermogravimetric analyses （TG） , in the result that they have outstanding comprehensive properties, especially at high using temperature, such as at higher than 220 ℃. They can be processed not only by compression molding, injection and extrusion but also in solution. Therefore they can be strong candidates as high-performance matrix for fiber-reinforced composites, structural adhesives, separation membrane, functional coating and insulating materials. Thus they have found many applications often in harsh environments, for instance, in aerospace, electronics, petroleum, and nuclear industries.

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