Efficient Curing of Benzoxazine‐Epoxy Resins: Catalytic Strategies for Lowering Energy Consumption and Kinetic Analysis

ABSTRACT Traditional benzoxazine and epoxy resins often require high curing temperatures, leading to increased energy consumption and potential limitations in processing. In this study, an effort has been made to lower the curing temperature by introducing a catalytic system that improves polymerization kinetics. Various catalysts, including dithiopropionic acid, thiodipropionic acid, and mercaptopropionic acid, were explored to study the curing process using DSC. Further sulfur‐hydrazide catalyst was introduced into epoxy, benzoxazines, and benzoxazine‐epoxy system, a considerable reduction in curing temperature was noted. DGEBA and DGEBF with sulfur hydrazide catalyst resulted in dual exothermic peaks at 106°C/156°C and 98°C/152°C respectively. Moreover, curing kinetics were carried out for the benzoxazine‐epoxy system with sulfur‐hydrazide catalyst using the Kissinger and Ozawa methods. The results showed that the chosen catalysts considerably lowered the curing temperature while maintaining desirable performance characteristics, making the modified benzoxazine‐epoxy systems more energy efficient and suitable for advanced composite applications.