Crystalline polyaryletherketone microsphere toughened polyaryletherketone material and preparation method thereof

Abstract

The invention provides a crystalline polyaryletherketone microsphere toughened polyaryletherketone material and a preparation method thereof.The preparation method comprises the steps that crystalline polyaryletherketone is modified, then polyaryletherketone microspheres with the uniform and controllable particle size are obtained through an emulsion microsphere preparation method, the crystalline polyaryletherketone microspheres are obtained after acidification, and the crystalline polyaryletherketone microspheres are obtained. And then blending with polyaryletherketone powder, and carrying out hot pressing or injection molding to obtain the crystalline polyaryletherketone microsphere toughened polyaryletherketone material. According to the method, a dispersed phase is tightly combined with the interface of a polyaryletherketone resin matrix and is uniformly dispersed in the matrix while the processing and using temperature, the tensile property and the bending property of the polyaryletherketone are not reduced, so that the toughness of the composite material is remarkably improved, and the impact strength of the composite material can reach 6.7 kJ / m < 2 >.

Description

technical field [0001] The invention belongs to the technical field of toughening polymer resin-based materials, and in particular relates to a crystalline polyaryletherketone microsphere toughened polyaryletherketone material and a preparation method thereof. Background technique [0002] Polyaryletherketone resin is widely used in various fields due to its advantages of diversified functions, light weight, excellent mechanical properties and good plasticity, which makes up for the shortcomings and deficiencies of the original thermosetting resin, and significantly improves the technology of related equipment in various fields level and performance. With the emergence of special engineering plastics in the automotive, aerospace and other fields, the industry has put forward higher standards for their strength and higher requirements for their impact toughness. For example, the automotive field requires bumper materials with high impact strength to ensure the safety of vehi...

AI Technical Summary

Problems solved by technology

In this patent, the thermotropic liquid crystal polymer must form a microfibrous structure in thermoplastics, and use the existence of microfiber structures to slow down and prevent the expansion of cracks during impact. However, the interface compatibility between thermoplastics and epoxy resins is not ideal. As a result, the interface strength is poor, which limits the improvement of toughness

Moreover, the disadvantages of high cost of liquid crystal and difficulty in uniform dispersion in the matrix still need to be considered in process production

[0006] Patent No. CN113388065A discloses a controllable self-assembled polymer microsphere and epoxy resin reinforcement and toughening modification method, but utilizes the surface functional groups of the polymer microsphere and epoxy resin to form interfacial supramolecular crosslinking to improve the filler and epoxy resin. The interfacial bonding strength of the matrix, this method of interfacial compatibility improvement is not suitable for the polyaryletherketone matrix; and the polymer microspheres cannot maintain crystallinity after surface modification, although the interfacial compatibility between the filler and the matrix is ​​improved, But it has a great influence on its solvent resistance

[0007] Patent No. CN109111639A discloses a technical route for composite reinforcement, toughening and anti-cracking fiber materials, which uses glass fiber and steel fiber for mixing, and adds materials such as inorganic additives, initiators and thickeners to synergistically increase the resin matrix. Toughening, but the above-mentioned technical route does not effectively solve the problem of poor interfacial bonding between fiber and resin matrix, and is not suitable for the toughening of polyaryletherketone matrix. High-performance thermoplastic resins such as polyaryletherketone and inorganic toughening fibers Poor infiltration and interfacial bonding will lead to insufficient interlayer shear strength of composite materials, and the application performance attenuation in harsh environments is abnormally obvious. Therefore, effectively improving the interface interaction between polyaryletherketone resin matrix and toughening phase is currently the Key scientific problems in this type of research on composite materials

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