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

Abstract

AbstractPropagation rate coefficients, kp, of N‐vinylcarbazole in solution have been determined via visible light pulsed‐laser polymerization over a wide temperature range (EA = 25.3 ± 5 kJ · mol−1, A = 1.0 × 108 L · mol−1 · s−1). The kp data set was used to deduce (average) termination rate coefficients via 1H NMR spectroscopic kinetic experiments and the corresponding Arrhenius parameters (EA = −8.5 kJ · mol−1 ± 8 kJ · mol−1).Temperature dependence of the propagation rate coefficient, kp, 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 imageTemperature dependence of the propagation rate coefficient, kp, 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).