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Fluorine-containing thermoplastic polyimide polymer and preparation method thereof

A polyimide and thermoplastic technology, which is applied in the field of fluorine-containing thermoplastic polyimide polymer and its preparation, can solve the problems of few types of polyimide, reduce water absorption, improve thermal oxidation stability, and good The effect of thermal stability

Active Publication Date: 2007-10-31
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of improving the thermoplasticity of polyimide, it is mainly through the screening of a large number of monomer types. At present, there are few types of thermoplastic polyimides used.

Method used

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  • Fluorine-containing thermoplastic polyimide polymer and preparation method thereof
  • Fluorine-containing thermoplastic polyimide polymer and preparation method thereof
  • Fluorine-containing thermoplastic polyimide polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a three-neck flask equipped with inert gas, mechanical stirring, water separator / water condenser, and thermometer, add 125 parts of 1,4-bis(4'-amino-2'-trifluoromethylphenoxy)benzene (BAPB) and 1000 parts of m-cresol, stir and dissolve completely, add 90 parts of 3,3',4,4'-diphenylmethyl ether tetra-acid dianhydride (ODPA) and 2.65 parts of phthalic anhydride, then add 40ml of toluene and 3- 5 drops of isoquinoline, heated to 180°C, reacted at this temperature for 15 hours, cooled the reaction solution below 120°C, washed repeatedly with a large amount of ethanol and water to remove the solvent, and dried to obtain a white powder. The powder can be thermally molded at high temperature to obtain resin molded parts.

Embodiment 2

[0022] Add 500ml of N-methylpyrrolidone (NMP) in a three-necked flask equipped with inert gas and mechanical stirring, and then gradually add 52 parts of 4,4'-bis(4-amino-2-trifluoromethylphenoxy) After the biphenyl (p-6FBAB) is completely dissolved, add 95 parts of 3,3',4,4'-biphenyltetraacid dianhydride and 1.12 parts of phthalic anhydride, and react under the protection of an inert gas for 24 hours to obtain a polyamic acid solution. The polyamic acid solution was coated on a smooth glass plate, and the polyimide film was obtained by temperature programming up to 300°C.

Embodiment 3

[0024] Add NMP600ml in a three-necked flask equipped with inert gas and mechanical stirring, then gradually add 60 parts of 4,4'-bis(4-amino-2-trifluoromethylphenoxy)biphenyl (p-6FBAB), After all the solution was dissolved, 127 parts of 4,4'-(hexafluoroisopropyl)diphthalic dianhydride and 1.25 parts of phthalic anhydride were added, and a polyamic acid solution was obtained after reacting for 10 hours under the protection of an inert gas. The short fiber is added to the above polyamic acid solution, and the composite material molding powder is obtained after the temperature program is raised in a vacuum oven, and the composite material molded part is obtained by hot molding at a high temperature.

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Abstract

The invention discloses a thermoplastic polyimide polymer with fluorine and preparing method, which is characterized by the following: setting the structural formula as formula I; proceeding condensed and polymeric reaction with aromatic dianhydride, aromatic diamine and sealing end agent; synthesizing thermoplastic polyimide; introducing fluorine-containing group and flexible ether link in polyimide backbone structure; decreasing molecular chain rigidity and acting force of molecular chain; possessing good function to improve dissolving property and flux processability of polyimide; decreasing specific absorption of the material through introduction of fluorine-containing group; increasing stability of thermal oxidation. This product possesses good heat endurance and mechanics mechanical property, which can be used to outer-space, electron, micro electron, petrochemical, car and so on domain.

Description

technical field [0001] The invention relates to a fluorine-containing thermoplastic polyimide polymer and a preparation method thereof. Background technique [0002] Aromatic polyimide is the most successful type of high-temperature-resistant / high-performance polymers. Because of its excellent comprehensive properties, it is currently widely used in aerospace, electronic and electrical, precision machinery, petrochemical, automotive and other fields ( Thermosetting Polyimides. A Review, SAMPE Journal, v 30, n 5, Sept-Oct, 1994, p29; Recent advances in the development of processable high-temperature polymers. Annual Review of Materials Science, 1998, 28: 599-630), which The form of material products includes polyimide matrix resin and its composite materials, high-performance engineering plastics, high-temperature adhesives, films, coatings, fibers and foams, etc. However, most aromatic polyimide materials are insoluble and infusible, and their processing and molding conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
Inventor 杨士勇陈建升范琳
Owner INST OF CHEM CHINESE ACAD OF SCI
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