What's the reason for grading? What about the use of composites? What's the difference?
3, carbon fiber has high strength, high modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, heat transfer and other characteristics, is a typical high-tech products. Mainly used in the preparation of advanced composite materials (ACM), has been widely used in aerospace, sporting goods industry, industrial fields, transportation and civil construction field. In view of the composite technology in military industry, reduce the cost of carbon fiber atrophy and advanced low cost manufacturing breakthrough, carbon fiber composite material used in construction, industry, transportation and other aspects has become a hot research and development, and achieved a breakthrough in certain
2, according to mechanical properties can be divided into general type and high performance type. The strength of the universal carbon fiber is 1000 MPa (MPa) and the modulus is about 100GPa. High performance carbon fiber is divided into high strength (strength 2000MPa, modulus 250GPa) and high model (modulus 300GPa or more). Strength is greater than 4000MPa, also known as ultra high strength; modulus is greater than 450GPa, known as ultra-high model. With the development of aerospace and aviation industry, carbon fiber with high strength and high elongation has come into being. Its elongation is greater than 2%. The largest amount of polyacrylonitrile is PAN based carbon fiber.
1, carbon fiber has a benzene ring structure, making it difficult to rotate the molecular chain. A polymer molecule cannot fold and stretch to form a rodlike structure, thus giving fibers a high modulus.The linear structure of carbon fiber polymers allows molecules to be arranged so closely that a large number of polymer molecules can be accommodated in a unit volume. This high density makes the fibers stronger.
