聚丙烯腈 (Polyacrylonitrile, or PAN) is a synthetic polymer made from the polymerization of acrylonitrile monomers. It is known for its high strength, chemical resistance, and thermal stability, making it suitable for various applications, including textiles and carbon fiber production. In the textile industry, 聚丙烯腈 is often used to create synthetic fibers that mimic wool. Additionally, it serves as a precursor for producing carbon fibers, which are utilized in aerospace, automotive, and sporting goods due to their lightweight and durable properties.