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A high-performance aromatic polymer fiber and its preparation method

An aromatic polymer, high-performance technology, applied in the direction of fiber processing, fiber type, single-component copolyamide rayon, etc., which can solve the unfavorable macromolecular conformational transition, difficulty in molecular motion, and inability to realize benzimidazole based Co-ordination reactions occur at the same time

Active Publication Date: 2021-07-30
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this method, the aromatic polymer finished fiber is statically soaked or dynamically continuously passed through a mixed solution made of an organic polar solvent containing transition metal ions and water, and the reaction seriously hinders the diffusion of metal ions to the inside, thereby affecting the Coordinated metal ions are evenly distributed inside the fiber; moreover, the finished fiber has high crystallinity and difficult molecular movement, which is not conducive to the transformation of macromolecular conformation, and it is impossible to realize the simultaneous integration of metal ions with multiple benzimidazole groups on different macromolecular chains. The coordination reaction of the groups occurs at the same time to realize the coordination cross-linking; in addition, the transition metal ions used in it, Fe 3+ Catalytic degradability
Therefore, the benzimidazole-containing aromatic polymer fiber cannot meet the requirements in terms of compression performance and thermal stability.

Method used

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  • A high-performance aromatic polymer fiber and its preparation method
  • A high-performance aromatic polymer fiber and its preparation method
  • A high-performance aromatic polymer fiber and its preparation method

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Experimental program
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Embodiment 1

[0039] Embodiment 1 Preparation of aromatic polymer fiber and composite material thereof of the present invention

[0040] 1, the preparation of aromatic polymer fiber of the present invention

[0041] First, the aromatic polymer is obtained by polymerization according to the monomer molar ratio TPC:PDA:PABZ=10:5:5, and then the aramid primary fiber of the aromatic polymer is obtained by wet spinning, and is soaked statically at 80°C in Contains CuCl 2(mass fraction 2%) in the DMSO / water mixed solution (DMSO volume fraction is 10%), after reacting for 60mins, dry, then carry out tension-free static heat treatment under 360 ℃, nitrogen atmosphere, obtain finished fiber, promptly the present invention aromatic polymer fibers.

[0042] 2, the preparation of composite material of the present invention

[0043] Add the aromatic polymer fiber obtained in step 1 to epoxy resin (the mass fraction of the fiber is 50%) to prepare the corresponding composite material.

Embodiment 2

[0044] Embodiment 2 Preparation of the aromatic polymer fiber of the present invention and its composite material

[0045] 1, the preparation of aromatic polymer fiber of the present invention

[0046] First, the aromatic polymer is obtained by polymerizing according to the monomer molar ratio TPC:PDA:PABZ=10:3:7, and then the aramid primary fiber of the aromatic polymer is prepared by wet spinning, and soaked statically at 50°C in Contains CuSO 4 (mass fraction 0.01%) in the DMAc / water mixed solution (DMAc volume fraction is 5%), after reacting for 30mins, dry, then carry out tension-free static heat treatment under 360 ℃, nitrogen atmosphere, obtain finished fiber, promptly the present invention aromatic polymer fibers.

[0047] 2, the preparation of composite material of the present invention

[0048] Add the aromatic polymer fiber obtained in step 1 to epoxy resin (the mass fraction of the fiber is 50%) to prepare the corresponding composite material.

Embodiment 3

[0049] Embodiment 3 Preparation of the aromatic polymer fiber of the present invention and its composite material

[0050] 1, the preparation of aromatic polymer fiber of the present invention

[0051] First, the aromatic polymer is obtained by polymerizing according to the monomer molar ratio TPC:PDA:PABZ=10:7:3, and then the aramid primary fiber of the aromatic polymer is obtained by wet spinning, and is soaked statically at 90°C in Contains CuCl 2 (mass fraction 10%) in the NMP / water mixed solution (NMP volume fraction is 30%), after reacting for 5mins, dry, then carry out tension-free static heat treatment under 360 ℃, nitrogen atmosphere, obtain finished fiber, promptly the present invention aromatic polymer fibers.

[0052] 2, the preparation of composite material of the present invention

[0053] Add the aromatic polymer fiber obtained in step 1 to epoxy resin (the mass fraction of the fiber is 50%) to prepare the corresponding composite material.

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Abstract

The invention provides a method for preparing a high-performance aromatic polymer fiber. The method includes the following steps: taking the as-spun aromatic polymer fiber as a raw material, immersing it in a solution containing transition metal ions, reacting, and drying , heat treatment, that is. The aromatic polymer fiber prepared by the method can form a uniform multi-coordination structure with metal ions, has excellent comprehensive performance, and significantly improves tensile performance, compression performance, thermal stability and ultraviolet resistance. Utilizing the above-mentioned aromatic polymer fiber, the present invention further prepares its epoxy resin composite material, the interlaminar shear strength of the composite material is significantly improved, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a high-performance aromatic polymer fiber and a preparation method. Background technique [0002] As a kind of high-performance fiber, aromatic polymer fiber (aramid for short) is widely used in various fields such as national military industry because of its excellent mechanical properties and heat resistance. Compared with carbon fiber, aramid fiber has the advantage of light weight, which can significantly reduce its weight when used as a material for large composite structural parts such as aircraft and spacecraft. However, considering the practical application of composite materials, aramid fibers have some disadvantages compared to carbon fibers, which mainly include two aspects. The first is the lower interface performance of composite materials and the compressive properties of fibers. heat resistance. [0003] Aramid III fiber is a high-performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/155D01F6/80C08L63/00C08L77/10C08J5/06D06M101/36
CPCC08J5/06C08J2363/00C08J2477/10D01F6/80D06M11/155D06M2101/36
Inventor 刘向阳程政罗龙波王旭刘洋刘昌莉
Owner SICHUAN UNIV
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