Polyphosphazene covalent triazine polymer and preparation method and application thereof

A technology of covalent triazine and phosphazene compounds, which is applied in the field of polyphosphazene covalent triazine polymers and their preparation, can solve the problems of complex preparation process, limitation of practical application, and damage to the mechanical properties of polymer substrates, and achieve The effect of simple preparation process, great practical application potential and easy post-processing

Active Publication Date: 2019-12-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the nitrogen-containing heterocyclic phosphazene derivatives are small molecules, and the preparation process is relatively complicated; in addition, the nitrogen-containing heterocyclic phosphazene derivatives usually need to be compounded with other flame retardants such as ammonium polyphosphate In order to achieve a better flame retardant effect, this greatly limits their practical application
In addition, in order to achieve a better flame retardant effect, it is usually necessary to add a large amount of phosphazene-based flame retardants to the polymer substrate, which greatly damages the mechanical properties of the polymer substrate.

Method used

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  • Polyphosphazene covalent triazine polymer and preparation method and application thereof
  • Polyphosphazene covalent triazine polymer and preparation method and application thereof
  • Polyphosphazene covalent triazine polymer and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Under the protection of nitrogen, dissolve 57.44 mmol HCCP, 344.8 mmol 4-hydroxybenzonitrile and 828 mmol potassium carbonate in 800 mL acetone, then react at 55 °C for 10 h, after the reaction, remove the excess by rotary evaporation solvent, and washed several times with a large amount of deionized water, and then suction filtered, and the crude product was recrystallized and dried to obtain the cyano-containing phosphazene compound M1.

[0042] (2) Under nitrogen protection, disperse 18.5 mmol of cyano-containing phosphazene compound M1 in chloroform, control the temperature at 0 °C, and gradually add 120 mmol of trifluoromethanesulfonate to the above system using a constant pressure dropping funnel The acid was dropped within 30 min and kept at 0 °C for 2 h, then at room temperature for 22 h. After the reaction, 1.0 mol / L ammonia solution was added to adjust the pH of the system to be neutral, and stirred for 2 h. Finally, the obtained product was filtered, was...

Embodiment 2

[0048](1) Under the protection of nitrogen, dissolve 57.44 mmol HCCP, 344.8 mmol 4-hydroxybiphenonitrile and 828 mmol triethylamine in 800 mL acetone, then react at 55 °C for 24 h, after the reaction, remove by rotary evaporation Excess solvent, washed several times with a large amount of deionized water, and then suction filtered, recrystallized and dried the crude product to obtain the cyano-containing phosphazene compound M2.

[0049] (2) Under nitrogen protection, disperse 18.5 mmol of cyano-containing phosphazene compound M2 in chloroform, control the temperature at 0 °C, and gradually add 120 mmol of trifluoromethanesulfonate to the above system using a constant pressure dropping funnel The acid was dropped within 30 min and kept at 0 °C for 2 h, then at room temperature for 22 h. After the reaction, 0.5 mol / L ammonia solution was added to adjust the pH of the system to neutral, and stirred for 2 h. Finally, the obtained product was filtered, washed several times with d...

Embodiment 3

[0051] (1) Under the protection of nitrogen, 57.44 mmol HCCP, 172.4 mmol 4-hydroxybenzonitrile, 172.4 mmol phenol and 828 mmol potassium carbonate were dissolved in 800 mL acetone, and then reacted at 55 °C for 48 h. After the reaction, The excess solvent was removed by rotary evaporation, washed several times with a large amount of deionized water, and then suction-filtered, and the crude product was recrystallized and dried to obtain the cyano-containing phosphazene compound M3.

[0052] (2) Under nitrogen protection, disperse 18.5 mmol of cyano-containing phosphazene compound M3 in chloroform, control the temperature at 0 °C, and gradually add 90 mmol of trifluoromethanesulfonate to the above system using a constant pressure dropping funnel The acid was dropped within 30 min and kept at 0 °C for 2 h, then at room temperature for 22 h. After the reaction, 0.5 mol / L ammonia solution was added to adjust the pH of the system to neutral, and stirred for 2 h. Finally, the obtain...

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Abstract

The invention discloses a polyphosphazene covalent triazine polymer and a preparation method and application thereof. According to the invention, a phosphazene derivative containing a cyano group at an end group is used as a precursor, and a cyclotrimerization reaction is carried out under the catalysis of protonic acid to prepare the covalent triazine polymer containing a phosphazene structure. The polyphosphazene covalent triazine polymer prepared by using the method has the characteristics of simple preparation process, mild reaction conditions, good thermal stability and the like. When theprepared polyphosphazene covalent triazine polymer is applied to flame retardance of epoxy resin, a synergistic flame-retardant effect is obtained, and the polyphosphazene covalent triazine polymer is high in flame-retardant efficiency, does not damage the mechanical properties of the epoxy resin and has great practical application value.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polyphosphazene covalent triazine polymer and a preparation method and application thereof. Background technique [0002] Epoxy resins are widely used in home appliances, transportation, construction and agriculture. However, their flammability limits their application in some fields such as electronics, electrical appliances, automobiles, aviation and aerospace. In order to reduce potential safety hazards, there is an urgent need to design highly efficient flame retardants and use them to efficiently improve the flame resistance of epoxy resins. [0003] Halogen-based, phosphorus-based and nitrogen-based flame retardants have always been the research focus in the field of flame retardants. However, halogen-based flame retardants that are harmful to the human body are gradually restricted in their application. With the development of science and technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C08G79/025C08L63/00C08L85/02C08L79/04
CPCC08G73/0644C08G73/065C08G79/025C08L63/00C08L2201/02C08L85/02C08L79/04
Inventor 王贵友方云志朱芸
Owner EAST CHINA UNIV OF SCI & TECH
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