Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (03): 373-378.doi: 10.3866/PKU.WHXB20070317

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

ZHAO Hong-Kai;QIAN Chun-Xiang   

  1. (College of Materials Science and Engineering, Southeast University, Nanjing 210096, P. R. China; Research Institute of Green Construction Materials, Southeast University, Nanjing 210096, P. R. China)
  • Received:2006-08-18 Revised:2006-11-09 Published:2007-03-07
  • Contact: QIAN Chun-Xiang E-mail:cxqian@seu.edu.cn

Abstract: Kinetic parameters were calculated based on the catalytic reaction systems of sodium caprolactam salt and N-75 biuret at the temperature of 145 ℃ to 160 ℃. 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.

Key words: Caprolactam, Nylon 6, Adiabatic reaction, Anion, Kinetics