The matrix resins used in carbon fiber reinforced resin composites are mainly divided into two categories, one is thermosetting resin, the other is thermoplastic resin. Thermosetting resin is composed of reactive low molecular weight prepolymer or high molecular weight polymer with active group. In the process of molding, crosslinking and polycondensation are carried out under the action of curing agent or heat to form an insoluble crosslinking structure. Epoxy resin, bismaleimide, polyimide and phenolic resin are often used in composite materials.
The thermoplastic resin is composed of linear high molecular weight polymer, which dissolves and melts under certain conditions. Commonly used are polyethylene, nylon, polytetrafluoroethylene and peek. In the carbon fiber reinforced resin matrix composite, carbon fiber plays a reinforcing role, while the resin matrix makes the composite form a whole bearing external force, and transmits the load to the carbon fiber through the interface, Therefore, it has a direct impact on the technical performance, molding process and product price of carbon fiber composite, and the way of carbon fiber composite also has an impact on the performance of the composite.
Short cut carbon fiber reinforced thermoplastic resin composite (scfrtp) is an important part of engineering materials. This kind of composite material usually has good mechanical properties, good economic benefits and can be made into various shapes by hot pressing, extrusion or injection molding. Nylon 6 is a thermoplastic resin material with a wide range of applications, and filler reinforced modification is a common and effective method to improve the properties of nylon 6 composite. In recent years, much attention has been paid to the research of PA6 / CF. The properties of PA6 / CF Composite are affected by many factors: processing method and technology, carbon fiber content and length in the composite, dispersion and orientation of carbon fiber, interface structure between carbon fiber and PA6, and properties of nylon 6 and carbon fiber. However, the mechanical properties of thermoplastic composites mainly depend on the microstructure of polymer matrix and the interfacial properties between fiber and matrix, so it is very important to compare and analyze the microstructure and macroscopic properties of composites. In addition, PA6 as a semi crystalline polymer composite, the mechanical properties of PA6 / CF depend on the crystal structure and morphology of PA6 matrix, and the crystal structure and morphology depend on the processing technology of the composite. There are few reports about the relationship between the micro morphology and structure of PA6 / CF Composite and the macro performance system.
Carbon fiber reinforced polypropylene composite carbon fiber can improve the elastic modulus of polypropylene, but reduce the tensile strength, impact strength and elongation at break. Carbon fiber has a certain heterogeneous nucleation effect on PP, which improves the non isothermal crystallization peak temperature and the degree of product formation of PP matrix, and promotes the formation of β crystal in PP matrix. In the process of isothermal crystallization, polypropylene is easy to nucleate and crystallize at the end of carbon fiber section. The dispersion of epdm-g-mah and SEBS-g-MAH in PP matrix is better, which makes the impact strength and elongation at break of PP increase obviously. The PP / CF Composite with epdm-g-mah and SEBS-g-MAH has higher impact strength and modulus of elasticity. The addition of toughener in PP / CF Composite results in the decrease of nucleation ability and crystallization growth rate of PP matrix. The toughening agent did not change the crystalline form of PP / CF Composite, and the nucleation of carbon fiber in PP / CF Composite with toughening agent became obvious, which made the spherulites in the composite mainly grow near the carbon fiber. The preparation process of PP / CF Composite. Driven by the global trend of energy saving and environmental protection, the fuel consumption of automobiles has attracted more and more attention. Lightweight design has become an effective way for automobile energy saving and emission reduction. The material properties and development trend of carbon fiber composite materials are in line with the development needs of automobile industry. With the development of new energy vehicles, carbon fiber composite materials will be more and more widely used in vehicles. Editor: modified plastics service platform (English CN)
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