pentamethyl diethylenetriamine (pc-5): a versatile accelerator for structural composite curing introduction pentamethyl diethylenetriamine (pc-5), also known by its chemical formula c₉h₂₃n₃, is a tertiary amine widely employed as a catalyst or accelerator in various industrial applications, particularly in the realm of structural composite materials. its efficacy in reducing cure times while maintaining desirable mechanical properties...