Pentamethyl Diethylenetriamine (PC-5) in Fast-Curing Aerospace Epoxy Systems: A Comprehensive Overview Introduction Aerospace applications demand high-performance materials capable of withstanding extreme conditions, including high temperatures, intense vibrations, and exposure to corrosive environments. Epoxy resins, renowned for their excellent mechanical properties, adhesive strength, chemical resistance, and ease of processing, have become indispensable in this domain. However,...