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Soluble fluorinated polyimide material and preparation method thereof

A fluorinated polyimide and soluble technology, which is applied in the field of soluble fluorinated polyimide materials and its preparation, can solve problems rarely involving three-monomer fluorinated polyimide, and achieve good solubility, Excellent thermal stability and low absorption loss

Inactive Publication Date: 2012-06-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1569995 discloses a method of producing a fluorine-containing polyimide film with outstanding heat resistance, chemical resistance, water resistance, insulation, electrical properties and optical properties and a spin coater suitable for the method, CN1550801 discloses polyimide photoconductive materials with high heat resistance, high transparency, and low loss. However, the preparation of fluorine-containing polyimide materials involved in these patents is mainly based on two monomer polymers, and rarely involves three monomers. Preparation of Bulk Fluorinated Polyimide

Method used

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  • Soluble fluorinated polyimide material and preparation method thereof
  • Soluble fluorinated polyimide material and preparation method thereof
  • Soluble fluorinated polyimide material and preparation method thereof

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preparation example Construction

[0037] The preparation method of this soluble fluorinated polyimide optical material is:

[0038] a) The molar ratio of the total moles of the two dianhydride monomers to the ether bond-containing diamine monomer is 1:1, wherein the molar ratio of the two dianhydride monomers is 1:1 to 1:10. Under the conditions of nitrogen protection and ice bath, N, N-dimethylformamide solutions of two dianhydride monomers with a mass concentration of 5wt% to 50wt% and 5wt% to 50wt% of diamine monomers containing ether bonds Add the N, N-dimethylformamide solution into the reaction kettle, mix it and react at room temperature for 12-72 hours. Based on the total monomer mass of the polymerized monomers added, 5-5 10mL of xylene, heat up to 140-200°C, continue to react for 3-10 hours, the water formed by the reaction and xylene forms an azeotrope and evaporates, and after cooling to room temperature, a solution of soluble fluorinated polyimide material is obtained; The ratio of the total moles ...

Embodiment 1

[0043] The dianhydride 4,4'-(hexafluoroisopropyl)-phthalic anhydride (0.1111g, 0.25mmol, 6FDA), 4,4'-(4,4'-isopropyl-di-phenoxy ) bis(phthalic anhydride) (0.1301 g, 0.25 mmol, BPADA) and 1,4-bis(4-amino-2-trifluoromethylphenoxy) benzene (0.2140 g, 0.5 mmol, pBATB) were dissolved in N,N-dimethylformamide. Under nitrogen protection and ice bath conditions, the N,N-dimethylformamide solution of two dianhydride monomers with a mass concentration of 50wt% and 1,4-bis(4-amino-2- The N,N-dimethylformamide solution of trifluoromethylphenoxy)benzene was added to the reaction kettle, and at room temperature, it was reacted for 24 hours, and then 2 mL of xylene was added, and the thermal cyclization reaction was carried out at 165°C for 6 hours, and the reacted The solution was added dropwise to a mixed solution of 150 mL of methanol / water (the volume ratio of methanol to water was 1:1) and 1N HCl (2 mL), and a precipitate was precipitated, followed by suction filtration to obtain a cru...

Embodiment 2

[0047] The dianhydride 4,4'-(hexafluoroisopropyl)-phthalic anhydride (0.2222g, 0.5mmol, 6FDA), 1,4-bis(4-amino-2-trifluoromethylphenoxy) Benzene (0.1070g, 0.25mmol, pBATB) and 2,2'-bis[4-(4-aminophenoxy)phenyl]propane (0.1026g, 0.25mmol, BAPP) were dissolved in N,N-dimethyl In base formamide. A saturated solution was obtained. Under nitrogen protection and ice bath conditions, the N,N-dimethylformamide solution of two diamine monomers with a mass concentration of 50wt% and 4,4'-(hexafluoroisopropyl) of 50wt% were respectively - Add the N,N-dimethylformamide solution of phthalic anhydride into the reaction kettle, react at room temperature for 24 hours, then add 2 mL of xylene, heat cyclization reaction at 165°C for 6 hours, and add the reacted solution dropwise to 150 mL In a mixed solution of methanol / water (the volume ratio of methanol to water is 1:1) and 1N HCl (2mL), a precipitate was precipitated, and then filtered with suction to obtain a crude soluble fluorinated pol...

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Abstract

The invention discloses a soluble fluorinated polyimide material. The material is prepared by copolymerization of three monomers. The preparation method comprises: condensing and copolymerizing two dianhydride monomers and a diamine monomer having an ether bond according to the molar ratio of the two dianhydride monomers to the diamine monomer of 1:1, wherein the molar ratio of the two dianhydride monomers is 1:1 to 1:10; or condensing and copolymerizing a diamine monomer without an ether bond, a diamine monomer without ether bond and a dianhydride monomer according to a molar ratio of the diamine monomers to the dianhydride monomer of 1:1, wherein the molar ratio of the diamine with the ether bond to the diamine without the ether bond is 1:1 to 1:10. The general structural formula of the material is shown in description. The material has high solubility, low moisture rate, high thermal stability and low absorption loss.

Description

technical field [0001] The invention relates to a soluble fluorinated polyimide material and a preparation method thereof, belonging to the preparation category of polymer materials in photoelectric devices. Background technique [0002] With the rapid development of optical communications and all-optical networks, optical devices based on optical waveguide devices, such as optical splitters, optical combiners, optical switches, and optical modulators, have also been basically designed and developed. However, there is no clear winner in the field of desired materials. With glass, LiNbO 3 , III-V semiconductor materials (GaAs or InP), and Si-based inorganic waveguides are limited in the application of next-generation optical networks due to their shortcomings such as high price and complicated processing technology. Polymer materials have been widely used in the field of optical communication due to the great progress in special functional research and thin film preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
Inventor 周钰明方成何曼梅震宇卜小海崔一平张彤
Owner SOUTHEAST UNIV
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