Carbon Fiber Reinforced Polymer, CFRP is composed of carbon fiber as a reinforcing material and resin as a matrix material. Early carbon fiber composite materials were mainly used in the military field. With the improvement of material performance, molding process and price cost, carbon fiber composite materials are more and more used in general industry and sports and leisure fields.
Carbon fiber reinforced polypropylene composite material
Carbon fiber can improve the elastic modulus of polypropylene, but reduces the tensile strength, impact strength and elongation at break of the material. Carbon fiber has a certain heterogeneous nucleation effect on polypropylene, which improves the non-isothermal crystallization peak temperature and the degree of knot quality of the polypropylene matrix, and promotes the formation of the β crystal form in the PP matrix. In the isothermal crystallization process, polypropylene tends to nucleate and crystallize at the end of the carbon fiber section. The dispersion of EPDM-g-MAH and SEBS-g-MAH in PP matrix is better, so that the impact strength and elongation at break of PP are obviously improved. PP with EPDM-g-MAH and SEBS-g-MAH / CF composite material has high impact strength and elastic modulus. The addition of tougheners in PP / CF composites leads to a decrease in the nucleation ability of the matrix polypropylene and a slower crystal growth rate. The toughening agent did not change the crystalline form of the PP / CF composite material. The nucleation of carbon fiber in the PP / CF composite material with the toughening agent became obvious, so that the spherulite in the composite material mainly grew near the carbon fiber.
Carbon fiber reinforced nylon 6 composite material
Chopped carbon fiber reinforced thermoplastic resin composite (SCFRTP) is an important part of engineering materials. Such composite materials usually have good mechanical properties, good economic benefits and can be manufactured in various shapes by hot compression molding, extrusion molding or injection molding. Nylon 6 is a thermoplastic resin material with a wide range of applications, and filler-reinforced modification is a more commonly used and effective modification method to improve the performance of nylon 6 composite materials. The research of carbon fiber reinforced nylon 6 composite material (PA6 / CF) has received a lot of attention in recent years. The performance of PA6 / CF composites is affected by many factors: processing methods and processes, the content and length of carbon fibers in the composites, the dispersion and orientation of carbon fibers, the interface structure of carbon fibers and PA6, and the characteristics of nylon 6 and carbon fibers themselves. However, the mechanical properties of thermoplastic composites mainly depend on the microstructure of the polymer matrix and the interfacial properties of the fiber and the matrix, so it is particularly important to analyze the microstructure and macroscopic properties of the composite material. In addition, PA6 is a semi-crystalline polymer composite. The mechanical properties of PA6 / CF depend on the crystalline structure and morphology of the PA6 matrix. The crystalline structure and morphology depend on the processing technology of the composite material. There are few reports on the relationship between appearance and structure and macro-performance systems.
Driven by the global energy saving and environmental protection trends, the fuel consumption problem of automobiles has attracted more and more attention. Lightweight design has become an effective way for automotive energy saving and emission reduction. The material properties and development trends of carbon fiber composite materials are in line with the development needs of the automotive industry . With the development of new energy vehicles, carbon fiber composite materials will be more and more widely used in automobiles.