Abstract
Propagation rate coefficient (k p ) values have been measured for monomers in the methacrylate family -ethyl (EMA), n-butyl (BMA), and isobutyl (i-BMA)- using pulsed-laser polymerization combined with gel permeation chromatography (GPC). Molecular weight calibrations were verified using both commercial polymer standards and GPC viscometry. Covering the temperature range of 10-90 o C, the k p results are well fit by the Arrhenius relationship and are compared to previous determinations for methyl methacrylate (MMA). A definite increase in k p is observed when progressing from MMA to EMA to BMA, with k p differences between BMA and i-BMA slight
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