Study on the Preparation of Paraffin/Melamine Microcapsules for TBPB Reaction Thermal Control

Abstract To suppress thermal runaway during the synthesis process of tert ‐butyl peroxybenzoate (TBHB), phase change microcapsules (microPCMs) were prepared using paraffin as the core material and melamine‐formaldehyde resin (MF) as the wall material via in situ polymerization. When the emulsification time was 20 min, the reaction temperature was 80 °C, and the paraffin mass was 10 g, the characterization of SEM, Fourier transform infrared spectroscopy (FTIR), x‐ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and x‐ray photoelectron spectroscopy (XPS) confirmed that the microPCMs were successfully fabricated, with microcapsule encapsulation rate reaching 62.5 %. The investigation into the thermal runaway suppression effect of microPCMs during the synthesis of TBPB revealed that adding 5 g of microPCMs at 50 °C optimized overtemperature suppression, reducing the maximum temperature of the reaction system from 58.3 °C to 50.3 °C. This work expands the application of microPCMs in semi‐batch reactions and has significant implications for the prevention of thermal runaway incidents.