Propagation and Termination Rate Coefficients in <i>N</i>‐Vinylcarbazole Free Radical Polymerization Obtained via 440 nm Pulsed Laser and Online ¹H NMR Kinetic Experiments

Abstract

Abstract Propagation rate coefficients, k p , of N ‐vinylcarbazole in solution have been determined via visible light pulsed‐laser polymerization over a wide temperature range ( E A = 25.3 ± 5 kJ · mol −1 , A = 1.0 × 10 8 L · mol −1 · s −1 ). The k p data set was used to deduce (average) termination rate coefficients via 1 H NMR spectroscopic kinetic experiments and the corresponding Arrhenius parameters ( E A = −8.5 kJ · mol −1 ± 8 kJ · mol −1 ). Temperature dependence of the propagation rate coefficient, k p , in the free radical solution polymerization of NVC. The graph shows the data from 355 and 440 nm initiation as well as data previously obtained by Yamamoto et al. 5 The three sets of data have been analyzed separately (for details see text). magnified image Temperature dependence of the propagation rate coefficient, k p , in the free radical solution polymerization of NVC. The graph shows the data from 355 and 440 nm initiation as well as data previously obtained by Yamamoto et al. 5 The three sets of data have been analyzed separately (for details see text).