Critically-evaluated propagation rate coefficients in free radical polymerizations .1. Styrene and methyl methacrylate

Critically evaluated rate coefficients and confidence limits, with derived Arrhenius parameters and confidence ellipses, are reported for the propagation rate coefficients of styrene and methyl methacrylate at low conversion in bulk. Data were obtained by pulsed-laser polymerization in several laboratories, and obey the consistency criteria established for this technique. These results provide useful ''benchmarks'' for measurements of propagation rate coefficients by other workers and other techniques.