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Polyimide and preparation method thereof

A polyimide, amine-based technology, applied in the field of polyimide and its preparation, can solve problems such as inability to meet use requirements, and achieve the effects of adjustable molecular void size, good elasticity, and large specific surface area

Pending Publication Date: 2017-08-18
NANJING XINYUE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the development of science and technology, more refined requirements have been put forward for the performance of polyimide; the existing polyimide can no longer meet the needs of use

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] The tris(4-aminocyclohexane)methane monomer of this example is referring to literature: publication number is the German patent of DE2502893A1.

[0024] The synthesis of polyimide in this example is divided into two steps: the first step is to generate a polyimide precursor; the second step is to perform a ring-closure reaction on the generated polyimide precursor at high temperature.

[0025] The first step, the synthesis of polyimide precursor: under room temperature condition, the three (4-aminocyclohexane) methane monomer shown in the formula 2 of 1.230g, 4mmol, and 1.308g, the 6mmol Pyromellitic dianhydride was added into a 100ml three-necked flask, and then 15ml of N,N-dimethylacetamide was added to dissolve the reaction monomer. After the monomer is dissolved, equip the three-necked bottle with mechanical stirring, condenser and nitrogen. Continue to stir and react for 20 hours under the protection of nitrogen to obtain the precursor solution.

[0026] The seco...

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Abstract

The invention discloses polyimide and a preparation method thereof. Polyimide disclosed by the invention is of a closed loop structure formed by polymerization of a repetitive unit represented by a formula I (shown in description), wherein Ar represents a tetracarboxyl residue and a derivative thereof. Polyimide disclosed by the invention has a relatively large specific surface area, an adjustable molecular gap size and good elasticity and further has stretch resistance and liquid crystal properties. Triamine is of a non-aromatic structure, and a long conjugated structure of an original product is broken through, so that a transparent product can be obtained; and polyimide can be applied to flexible display substrate materials.

Description

technical field [0001] The present application relates to the field of polymer materials, in particular to a polyimide and a preparation method thereof. Background technique [0002] Polyimide refers to a class of polymers containing imide rings (-CO-NH-CO-) in the main chain. Since the invention of aromatic polyimide compounds by Dupont Company in the United States, there have been many different types of polyimides. Due to the unique advantages of polyimide, such as excellent mechanical properties, electrical properties and thermal properties, it is more and more widely used in electronics and special materials. However, with the development of science and technology, more refined requirements have been put forward for the performance of polyimide; the existing polyimide can no longer meet the use requirements. Contents of the invention [0003] The purpose of this application is to provide a kind of polyimide of brand-new structure, and preparation method thereof. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
CPCC08G73/1082
Inventor 刘屹东闵永刚杨文斌闵功勋宋建军
Owner NANJING XINYUE MATERIAL SCI & TECH
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