This lecture discusses the differences between thermoset and thermoplastic materials, focusing on epoxy resin. It covers the properties, applications, and curing methods of epoxy resin, emphasizing its high strength, good adhesion, and chemical resistance. The presentation explores various epoxy resin types, preparation methods, and curing agents. Additionally, it delves into the applications of epoxy resin in industrial, construction, automotive, aerospace, and consumer sectors, including structural bonding, concrete repair, and electronics. The lecture also touches on additive manufacturing techniques like SLA, DLP, and CLIP for epoxy resin, highlighting their role in producing continuous carbon fiber-reinforced composites.