Low-melt-viscosity thermoplastic polyimide material and 3D printing moulding method thereof

A polyimide and monomer technology, applied in the field of 3D printing molding materials, can solve the problems of few types of polymers, low temperature resistance, low product strength, etc. Strong knot and excellent effect

Active Publication Date: 2014-08-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the shortcomings of few types of polymers for 3D printing, low product strength, and high temperature resistance, using high-performance, low-melt viscosity polyimide as 3D printing materials, and polyimide prepared by fusion 3D printing technology. Imine parts have excellent high temperature resistance, corrosion resistance and high mechanical strength

Method used

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  • Low-melt-viscosity thermoplastic polyimide material and 3D printing moulding method thereof
  • Low-melt-viscosity thermoplastic polyimide material and 3D printing moulding method thereof
  • Low-melt-viscosity thermoplastic polyimide material and 3D printing moulding method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A low-melt viscosity thermoplastic polyimide compound is synthesized as follows: first, 1,4-bis(4-amino-2-trifluoromethyl)benzene and an appropriate amount of NMP are added to the reaction system until it is completely dissolved Then add 2,3,3',4'-diphenyl ether tetra-acid dianhydride and end-capping agent phenylacetylene phthalic anhydride, react for 10 hours, add excess acetic anhydride and triethylamine for chemical imidization, react for another 3 hours, and The above solution was submerged in a mixed solvent of ethanol and water, and a yellow powder was obtained after filtration, washing and vacuum heat treatment.

[0055] Furthermore, a 3D printing molding method of a low-melt viscosity thermoplastic polyimide material is as follows:

[0056] (1) According to the set space spray forming sequence, the system model of the workpiece is provided through computer-aided (CAD) design. Through the system model and the forming machine data exchange interface program, the ...

Embodiment 2

[0064] A low melt viscosity thermoplastic polyimide compound is synthesized as follows: first add 2,2'-bistrifluoromethyl-4,4'-biphenylenediamine and an appropriate amount of DMAc to the reaction system, and wait for After complete dissolution, add 3,3',4,4'-diphenyl ether tetra-acid dianhydride and end-capping agent phthalic anhydride. After 10 hours of reaction, add excess acetic anhydride and triethylamine for chemical imidization, and then After reacting for 3 hours, the above solution was immersed in a mixed solvent of ethanol and water, and a yellow powder was obtained after filtration, washing and vacuum heat treatment.

[0065] Furthermore, a 3D printing molding method of a low-melt viscosity thermoplastic polyimide material is as follows:

[0066] (1) According to the set space spray forming sequence, the system model of the workpiece is provided through computer-aided (CAD) design. Through the system model and the forming machine data exchange interface program, the...

Embodiment 3

[0074] A low-melt viscosity thermoplastic polyimide compound is synthesized as follows: first add 4,4'-ammonia-2,2'-methyl-1,1'-biphenyl and an appropriate amount of DMF to the reaction system, After it is completely dissolved, add 2,3,3',4'-biphenyltetracarboxylic dianhydride and end-capping agent 5-norbornene-2,3-dianhydride, and add excess acetic anhydride and triethylene dianhydride after 10 hours of reaction The amine was subjected to chemical imidization, and then reacted for 3 hours. The above solution was immersed in a mixed solvent of ethanol and water, and a yellow powder was obtained after filtration, washing and vacuum heat treatment.

[0075] Furthermore, a 3D printing molding method of a low-melt viscosity thermoplastic polyimide material is as follows:

[0076] (1) According to the set space spray forming sequence, the system model of the workpiece is provided through computer-aided (CAD) design. Through the system model and the forming machine data exchange in...

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Abstract

The invention discloses a low-melt-viscosity thermoplastic polyimide material which is used for 3D printing. Molecular structure of the thermoplastic polyimide material is subjected to a modification process (such as introducing a special flexibility structure unit, a large side group or solvophilic group, a twisted and non-coplaner structure, characteristic atoms such as a heterocycle and a fluorine silicon and the like, and carrying out a main chain copolymerization reaction) to enable the polyimide material to be meltable and thus to have good processability a well processing performance. The polyimide material, after being mixed with a heat stabilizer and a reinforcing agent, is manufactured into a high-performance polyimide product in a manner of melting 3D printing technology. The polyimide material widens a selectable range of present 3D printing materials. With the high-performance and low-melt-viscosity thermoplastic polyimide as a 3D printing material, the high-performance polyimide product prepared from the polyimide material has excellent high temperature resistance performance, corrosion resistance performance and mechanical strength.

Description

technical field [0001] The invention relates to the field of 3D printing molding materials, in particular to a class of low-melt viscosity thermoplastic polyimide materials suitable for 3D printing and a 3D printing molding method thereof. Background technique [0002] Rapid prototyping technology is a technology that uses a computer to establish a three-dimensional model of an object, and based on this technology, it is a technology that is directly formed. Compared with traditional forming technology, it significantly shortens the research and development cycle of new products and reduces the cost of research and development. There are many kinds of rapid prototyping methods, such as laser sintering, laser melting, fused deposition, 3D printing, three-dimensional photolithography and so on. The basic working principle of rapid prototyping technology is modeling, stacking and rapid prototyping. Firstly, the physical shape of the object is converted into a three-dimensional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08G73/12C08L79/08C08K3/36C08K3/26C08K7/00C08K3/04B29C67/00
Inventor 李志波盛力王小实张树升夏爽李春成林学春马永梅孙文华徐坚董金勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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