Preparation and Characterization of an Ionomeric Self‐Healing Poly(Epichlorohydrin) With Different Approaches

This study investigates the successful modification of epichlorohydrin‐based rubbers by incorporating phenol sulfonate, butyl imidazole, and sodium azide via chemical modification. Fourier transform infrared spectroscopy (FT‐IR) and nuclear magnetic resonance ( 1 H NMR and 1 3 C NMR) analyses were utilized to characterize the structural changes and chemical interactions induced by the additives. The objective was to enhance the polymer's mechanical and thermal properties while imparting self‐healing capabilities. Post‐modification, thermogravimetric analysis (TGA) confirmed significant improvements in thermal stability. Stress‐strain analysis revealed increased tensile strength and elongation at break, demonstrating enhanced elasticity and resilience, with a 150% improvement in tensile strength and 80% elongation at break, indicating superior elasticity. Notably, the modified rubbers exhibited autonomous self‐repair within 24 h after mechanical damage, attributed to dynamic bonds π − π interaction and hydrogen bonding networks. These advancements, supported by microscopic evaluations, highlight the potential of tailored epichlorohydrin‐based rubbers for applications in durable coatings, aerospace seals, and adaptive industrial materials requiring resilience under extreme conditions.