A kind of thermosetting polyimide and its application

A technology of polyimide and thermosetting, applied in the field of thermosetting polyimide, can solve the problems of thermosetting polyimide, low mechanical properties, and far difference, etc., and achieve good reprocessing characteristics and strong mechanical properties , good recyclable effect
CN108794752BActive Publication Date: 2021-03-09LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2021-03-09

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Abstract

The invention discloses thermosetting polyimide. Firstly dianhydride 2, 3' 3', 4-biphenyl tetracarboxylic diandhydride and dianhydride 4, 4'-diaminodiphenyl ether and / or 3, 4'-diaminodiphenyl ether are taken to form a copolymerized linear ammonia end-blocking oligomer, and then the copolymerized linear ammonia end-blocking oligomer is gradually reacted with paraformaldehyde at low temperature, soas to form a cross-linked structure, and finally a hyperbranched polyimide film material is formed through a tape casting method. The invention further discloses application of the thermosetting polyimide to realizing of complex 3D structures. The thermosetting polyimide has the properties, such as repairability, excellent reprocessing property, high mechanical property, good temperature resistance and recoverability, and is expected to be a new generation of environment-friendly material to be applied to precision components with complex structures.
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Description

technical field

[0001] The present invention relates to a thermosetting polyimide and its use in the realization of complex 3D structures, the material has good repair properties, weldability and recyclability. Background technique

[0002] As a high-performance polymer, polyimide is widely used in advanced fields such as aerospace, especially thermosetting polyimide and its composite materials. Thermosetting polyimide is known as a material that can replace some metals in the 21st century due to its excellent temperature resistance and outstanding mechanical properties, and has become one of the indispensable materials in cutting-edge technology fields such as global rockets and aerospace. However, as we all know, the main disadvantages of thermosetting resins are: 1) It cannot be repaired or reprocessed after thermosetting molding; 2) It cannot be recycled or degraded. With the rapid development of high technology in recent years, the development of polymers has also ente...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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