pentamethyl diethylenetriamine (pc-5) in high-temperature engine component coatings: a comprehensive overview abstract: pentamethyl diethylenetriamine (pc-5), a tertiary amine, possesses unique properties that make it a valuable additive in high-temperature engine component coatings. this article provides a comprehensive overview of pc-5, covering its chemical and physical properties, synthesis methods, applications in high-temperature coatings (specifically focusing on...