Nylon is a common name for polyamide (PA), and it is a general term for thermoplastic resins containing repeated amide groups on the main chain of the molecule.
Nylon Polyamide
Nylon is a common name for polyamide (PA), and it is a general term for thermoplastic resins containing repeated amide groups on the main chain of the molecule, including aliphatic polyamides, aliphatic-aromatic polyamides and aromatic polyamides.
As the first of the five major engineering plastics, nylon is widely used in industry, mainly in the fields of auto parts, mechanical parts, electronic appliances, cosmetics, adhesives and packaging materials. Among them, the largest output and the most widely used are aliphatic polyamides, mainly nylon 66 and nylon 6.
Nylon 66 Polyamide 66
Nylon 66 (PA66) is polycondensed from adipic acid and hexamethylenediamine. It is a type of polyamide. The molecular formula is shown in the figure.
Advantages: high strength, corrosion resistance, good wear resistance, and has excellent properties such as self-lubrication, flame retardancy, non-toxic and environmental protection.
Disadvantages: poor heat resistance and acid resistance, low impact strength in dry state and low temperature, high water absorption rate affects product dimensional stability and electrical properties.
High performance fibers High performance fibers
High-performance fibers refer to chemical fibers with high bearing capacity and high durability, because they have special physical structures or chemical structures that reflect some excellent characteristics that traditional fibers do not have, such as high temperature resistance, corrosion resistance, resistance flammability and other properties.
Carbon Fiber
Carbon fiber is an inorganic polymer material with a carbon content higher than 90% obtained by carbonizing and graphitizing organic fibers.
The microstructure of carbon fiber is similar to artificial graphite (C atomic layer arrangement), which is a turbostratic graphite structure.
Advantages: light weight, high strength, high modulus, high temperature resistance, wear resistance, corrosion resistance, fatigue resistance, electrical conductivity, thermal conductivity, etc.
Disadvantages: high cost, difficult to infiltrate, poor transparency, difficult to inspect defects, etc.
Carbon fiber is mainly divided into: polyacrylonitrile-based carbon fiber, pitch-based carbon fiber, viscose-based carbon fiber
Carbon fiber composite material is a very useful structural material. It is not only light in weight and high temperature resistant, but also has high tensile strength and elastic modulus. It is an indispensable component for manufacturing spacecraft, rockets, missiles, high-speed aircraft and large passenger aircraft. Material. It is also widely used in industrial sectors such as transportation, chemical industry, metallurgy, construction and sports equipment.
High-performance composite material preparation process
