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Polyimide film and preparation method thereof

A technology of polyimide film and polyimide acid, which is applied in the field of polyimide film and its preparation, can solve the problems of restricting the development and application of electronic devices and high dielectric loss, and achieve low dielectric loss and low The effect of dielectric constant and easy operation

Inactive Publication Date: 2022-05-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the polyimide film in the prior art has the defects of high dielectric constant and high dielectric loss, which limits the development and application of electronic devices in 5G communication equipment

Method used

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  • Polyimide film and preparation method thereof
  • Polyimide film and preparation method thereof

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Embodiment 1

[0045] Embodiment 1 provides a polyimide film, which is mainly formed by polymerization of mixed diamine monomers and mixed dianhydride monomers.

[0046] Wherein, the mixed diamine monomer includes aryl diamine monomer and 3,3'-p-aminodiphenyl ether in a molar ratio of 4:3.

[0047] The aryl diamine monomer is a molar ratio of 2:1:1 mixed.

[0048] The mixed dianhydride monomers include 4,4'-(hexafluoroisopropylene)diphthalic anhydride and 3,3',4,4'-biphenyltetracarboxylic dianhydride in a molar ratio of 3:3.

[0049] The preparation method of above-mentioned polyimide film mainly comprises the following steps:

[0050] 1. Purification of aryl diamine monomer and 3,3'-p-aminodiphenyl ether;

[0051] Place the aryl diamine monomer and 3,3'-p-aminodiphenyl ether in a sublimation device, heat up under vacuum conditions, collect white crystals after cooling, and grind them into fine powder in a dry and dust-free environment Purification is done in powder form.

[0052] In...

Embodiment 2

[0067] The specific embodiment is consistent with Example 1, except that the mixed diamine monomer includes aryl diamine monomer and 3,3'-p-aminodiphenyl ether in a molar ratio of 3:4.

[0068] The aryl diamine monomer is a molar ratio of 0.1:2:0.1 mixed.

Embodiment 3

[0070] The specific embodiment is consistent with Example 1, except that the mixed diamine monomer includes aryl diamine monomer and 3,3'-p-aminodiphenyl ether in a molar ratio of 5:4.

[0071] The aryl diamine monomer is a molar ratio of 3:0.1:2 mixed.

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Abstract

The invention provides a polyimide film and a preparation method thereof, the polyimide film is mainly prepared from a mixed diamine monomer, and the mixed diamine monomer comprises an aryl diamine monomer and a 3, 3 '-biphenyl diamine monomer. The molar ratio of the aryl diamine monomer to the 3, 3 '-p-aminodiphenyl ether is (3-5): (2-4), and the chemical structural formula of the aryl diamine monomer is formed by mixing one or more of the following structural formulas. And the polyimide film with low dielectric loss meets the communication requirements of the current 5G technology.

Description

technical field [0001] The invention relates to the technical field of electronic materials, in particular to a polyimide film and a preparation method thereof. Background technique [0002] Polyimide is an aromatic heterocyclic polymer compound containing imide groups in the repeating unit. It is one of the organic polymer materials with the best comprehensive performance. It has good mechanical properties, high temperature resistance, dimensional stability, and Solvent, excellent electrical properties, etc. [0003] As a new generation of mobile communication system, 5G communication has higher transmission speed, lower delay, higher link density and faster response capability, achieving higher performance than 4G mobile communication system. Compared with the traditional mobile communication mode, the high-frequency and high-speed development of 5G signal transmission makes the rate, loss and integrity of signal transmission more prominent. Since millimeter waves used i...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08J5/18C08L79/08
CPCC08G73/1071C08G73/1042C08G73/1039C08J5/18C08J2379/08
Inventor 谢劲吴晓鹏朱成建
Owner NANJING UNIV
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