Radiation-assisted development of GMA/styrene coatings: enhanced chemical and mechanical properties via nanoclay reinforcement

Purpose This study aims to develop gamma radiation-curable coatings based on glycidyl methacrylate (GMA) and styrene, with and without nanoclay reinforcement, and to evaluate their chemical, mechanical and corrosion resistance properties. Design/methodology/approach GMA/styrene copolymers were synthesized via gamma irradiation at varying doses (4–15 kGy for pre-curing and up to 80 kGy for final curing). Nanoclay was incorporated at different loadings to enhance coating performance. The resulting films were applied to wood and steel substrates and evaluated for chemical resistance (ASTM D5402, D4752), corrosion resistance (ASTM D1308), gloss (ASTM D523), adhesion (ASTM D3359) and scratch resistance (ASTM D5178). Findings Gamma irradiation significantly improved crosslinking, leading to enhanced mechanical strength, surface gloss and resistance to solvents and acids. Optimal performance was observed at doses between 40–50 kGy. Nanoclay reinforcement further enhanced barrier properties, adhesion and resistance to chemical and corrosive agents, especially in acidic environments. Originality/value This research introduces an environmentally friendly, solvent-free radiation curing approach for high-performance GMA/styrene coatings. The study demonstrates the synergistic effect of gamma irradiation and nanoclay incorporation, making the system suitable for protective coatings in industrial and wood surface applications.