1. Different application fields
(1) Carbon fiber is a new type of fiber material with a carbon content of more than 95%. There are three categories: polypropylene cymbal, asphalt, and adhesive. Carbon fiber is called "black gold", indicating that its value and price are very high. It is mainly used in aerospace and national defense military workers. With the increase in the production capacity of large wire carbon fiber, more and more applications in industrial manufacturing and civilian fields are increasing. Essence
(2) Aramid fiber is a new type of synthetic fiber. This is different from carbon fiber. The aramid fiber also has the characteristics of high -strength and high models. It is commonly used on bulletproof products, construction materials, special protective clothing and electronic equipment.
2. Different mechanical properties
(1) T300 carbon fiber's stretching strength is 3000MPa, elastic modulus is 225GPa, the breakdown rate is 1.7%, density is 1.7g/cm^3, T1000 carbon fiber performance is higher than T300, and there are high modular and high strength and high strength The two series of carbon fibers in high models have greater performance interval.
(2) The stretching strength of the aramid fiber is 2815MPa, the elastic modulus is 126GPa, the fracture extension rate is 2.5%, and the density is 1.44g/cm³. The anti -impact performance of aramid fiber is very good, and the extension rate is relatively high. Compared with mechanical properties, the upper limit of carbon fiber is higher, especially in terms of strength and modulus.
3. Different thermal stability
(1) The aramid fiber has good thermal stability. Under the action of high temperature, it can be used until the decomposition does not deform and can be used for a long time at 180 ° C. After one week of action at 150 ° C, the strength and modulus will not decrease. In addition, its thermal expansion coefficient is -2 × 10^-6.
(2) Compared with the aramid, the thermal stability of the carbon fiber is also superior, and the thermal expansion coefficient is smaller than the aramid, which is -1.4 × 10^-6.
4. Different thermal chemistry
(1) The chemical properties of carbon fibers are met with carbon. In addition to being oxidized by strong oxidants, it is inert with general alkali. When the temperature is higher than 400 ° C in the air, obvious oxidation occurs, and CO and CO2 are generated. Carbon fiber has good corrosion resistance to ordinary organic solvents, acids, and alkali, insoluble and not swelling, emergence of corrosion resistance, and no rust.
(2) The aramid fiber has a good resistance to resistance. It is generally strong for Hangzhou for neutral chemicals, but it is easy to be eroded by various pH, especially the erosion of strong acid. not good.