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A kind of side chain type polyimide material and its preparation method and application

A polyimide and side chain technology, applied in the field of organic optical functional materials, can solve the problems of fast decay of electro-optic activity, poor material orientation stability, doping, etc. The method is simple, convenient for chromophore content, reaction The effect of mild conditions

Active Publication Date: 2019-03-15
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to achieve practical standards, many organic polymers are used as carriers of electro-optic molecules, among which polycarbonate (APC) is the most widely used, but its disadvantage is that electro-optic molecules can only be doped into polycarbonate as a guest, resulting in The orientation stability of the material is not good, and the electro-optical activity decays quickly

Method used

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  • A kind of side chain type polyimide material and its preparation method and application
  • A kind of side chain type polyimide material and its preparation method and application
  • A kind of side chain type polyimide material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Synthesis of Hydroxyl-containing Polyimide (PI-OH)

[0052]

[0053] Aromatic dianhydride monomer 3,3',4,4'-diphenyl ether tetracarboxylic anhydride (10mmol), diamine monomer containing hydroxyl functional group 2,3-bis(3-amino-4-hydroxyphenyl ) propane (5mmol) and the aliphatic diamine monomer 1,6-hexanediamine (5mmol) were dissolved in N,N-dimethylacetamide respectively. Mix the above-mentioned dianhydride monomer and diamine monomer solution, and react at room temperature for 48 hours. Then add 10 mL of xylene, heat up to 150°C with azeotropic water, react for 24 hours, and cool to room temperature. Slowly pour the above solution into the mixed solution of ethanol / water, and adjust to weak acidity with dilute hydrochloric acid, precipitate out, and filter with suction. After preliminary drying, the above precipitate was dissolved in a small amount of tetrahydrofuran, slowly dropped into the mixed solution of ethanol / water, and adjusted to weak acidity with dilut...

Embodiment 2

[0055] Synthesis of side-chain electro-optic active polyimide PI-DR

[0056] The polyimide PI-OH (5mmol) that embodiment 1 obtains is dissolved in the mixed solution of 30mL tetrahydrofuran and 20mL dichloromethane, then successively chromophore DR (1mmol) under nitrogen protection, triphenylphosphine (1.2 mmol), diethyl azodicarboxylate (1.2mmol). React at room temperature for 48 hours, slowly drop into the mixed solution of ethanol / water, and adjust to weak acidity with dilute hydrochloric acid, precipitate out, and filter with suction. After dissolving with a small amount of tetrahydrofuran, the process of sedimentation and suction filtration was repeated several times, and after vacuum drying, a purple-red side chain type electro-optic polyimide PI-DR was obtained, wherein m=15, n=58. T g :168℃; Td 5％ : 295°C; UV-Vis (tetrahydrofuran): λ max = 470nm.

Embodiment 3

[0058] Synthesis of side-chain electro-optic active polyimide PI-TF

[0059] The polyimide PI-OH (5mmol) that embodiment 1 obtains is dissolved in the mixed solution of 30mL tetrahydrofuran and 20mL dichloromethane, then successively chromogen TF (1.5mmol) under nitrogen protection, triphenylphosphine ( 1.8mmol), diethyl azodicarboxylate (1.8mmol). React at room temperature for 72 hours, slowly drop into the mixed solution of ethanol / water, and adjust to weak acidity with dilute hydrochloric acid, precipitate precipitates, and filter with suction. After dissolving with a small amount of tetrahydrofuran, the process of sedimentation and suction filtration was repeated several times, and after vacuum drying, a purple-red side chain type electro-optical polyimide PI-TF was obtained. T g :162℃; Td 5％ : 280°C; UV-Vis (tetrahydrofuran): λ max = 550nm.

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Abstract

The invention discloses a side chain-type polyimide material and a preparation method and use thereof. The side chain-type polyimide material comprises a structural unit A and a structural unit B. The structural unit A is shown in the description. The structural unit B is shown in the description. The number of the structural unit A is an integer of 1 to 1000, the number of the structural unit B is an integer of 1 to 1000 and R represents a chromophore.

Description

technical field [0001] The invention relates to a side chain type polyimide material and its preparation method and application, belonging to the field of organic light functional materials. Background technique [0002] Electro-optic materials are widely used in optical communication, optical computing and other fields. At present, the practical electro-optical materials are mainly inorganic crystals, which have good physical and optical indicators. Compared with inorganic materials, organic materials have large nonlinear coefficient, fast response speed, high laser damage threshold, low dielectric coefficient, wide bandwidth, easy synthesis, easy modification, easy processing and deviceization, so they have received extensive attention. [0003] In order to achieve practical standards, many organic polymers are used as carriers of electro-optic molecules, among which polycarbonate (APC) is the most widely used, but its disadvantage is that electro-optic molecules can only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10
CPCC08G73/1007C08G73/1042C08G73/1053C08G73/1075
Inventor 罗熙雯王亮
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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