Carbon fiber reinforced polypropylene composite
Carbon fiber can increase the modulus of elasticity of polypropylene, but reduce the tensile strength, impact strength and elongation at break of the material. The carbon fiber has a certain heterogeneous nucleation effect on the polypropylene, which improves the non-isothermal crystallization peak temperature and the product quality of the polypropylene matrix, and promotes the formation of the β crystal form in the PP matrix. During isothermal crystallization, 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, which makes the impact strength and elongation at break of PP significantly improved. PP added to EPDM-g-MAH and SEBS-g-MAH /CF composites have high impact strength and modulus of elasticity.
The addition of a toughening agent in the PP/CF composite results in a decrease in the nucleating ability of the matrix polypropylene and a decrease in the rate of crystal growth. The toughening agent did not change the crystalline form of the PP/CF composite. The nucleation of the carbon fiber in the PP/CF composite material with the toughening agent became obvious, and the spherulites in the composite mainly grew near the carbon fiber.
China should speed up the research and development of carbon fiber, strive to achieve substantial breakthroughs in equipment and technology, and improve performance and reduce costs, so that China's carbon fiber industry can achieve leap-forward development; at the same time, it can also promote the rapid development of automobiles and related industries. development of.
