Research on the Kinetics of Nylon Polymerized by Caprolactam Anionic Polymerization Using Adiabatic Method

Abstract

Kinetic parameters were calculated based on the catalytic reaction systems of sodium caprolactam salt、N-75 biuret and at the temperature of 145 to 160 °C. The reaction order was approximately first order. The activation energy was between 73.2−77.1 kJ∙mol−1 and the pre-exponential factor was between 2.9×1011−3.6×1011 mol1−n∙s−1. The calculated reaction heat of 134.5−137.3 J∙g−1 was in consonance with the literature value of 138.6 J∙g−1. The adiabatic reaction kinetic model of caprolactam anion was constructed based on the existing research findings. The coincidence between the simulation results and the experimental data revealed that the model was reasonable and correct.