物理化学学报 >> 2007, Vol. 23 >> Issue (03): 373-378.doi: 10.3866/PKU.WHXB20070317

研究论文 上一篇    下一篇

绝热法研究己内酰胺阴离子聚合尼龙动力学

赵洪凯;钱春香   

  1. (东南大学材料科学与工程学院, 南京 210096; 东南大学绿色建材技术研究所, 南京 210096)
  • 收稿日期:2006-08-18 修回日期:2006-11-09 发布日期:2007-03-07
  • 通讯作者: 钱春香 E-mail:cxqian@seu.edu.cn

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

摘要: 采用己内酰胺钠盐、N-75缩二脲作为反应催化体系, 确定反应温度在145-160 ℃之间, 通过计算得到动力学参数: 反应级数为准一级、活化能在73.2-77.1 kJ·mol-1之间、指前因子在2.9×1011-3.6×1011 mol1-n·s-1范围内. 本实验条件下测定并计算的反应热为134.5-137.3 J·g-1, 与文献值(138.6 J·g-1)吻合. 并在前人基础上修正并建构了己内酰胺阴离子绝热反应动力学模型, 对反应过程的模拟结果与实验数据基本吻合, 从而证明了本模型的正确合理.

关键词: 己内酰胺, 尼龙6, 绝热反应, 阴离子, 动力学

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