Kinetic Modeling of Ring-Opening Polymerization of Benzoxazines Using MIL-53-Al as a Potent Catalyst

In this study, we report the successful synthesis of a novel Al-based MOF/polybenzoxazine nanocomposite by facile and green approach via thermally induced ring-opening polymerization (ROP). Structural thermal characterization synthesized was accomplished using FTIR, XRD, BET TGA, DSC techniques, respectively. The Al-MOF showed catalytic activity in ROP good stability compared to non-catalyzed system. impact MIL-53-Al on benzoxazine is revealed calorimetry at both isothermal dynamic modes detail. Starink isoconversional analysis that MOF-catalyzed proceeded faster reaction’s early stages, typically α ≤ 40%. Friedman method also applied experimental data get more insights into mechanisms reaction. Results indicated systems follow conversion-dependent mechanism for cationic benzoxazine. Although complexity benzoxazines reduces reliability model fitting, activation energy were confirmed. Moreover, it demonstrated reaction changes from autocatalytic n-order regime during An proposed which available AlO4(OH)2 octahedra act as active sites shifting curing exotherms lower temperatures.