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Pure Appl. Chem.,
Vol. 70, No. 7, pp. 1415-1418, 1998
MACROMOLECULAR DIVISION
COMMISSION ON POLYMER CHARACTERIZATION AND PROPERTIES
Working Party on Modeling of Polymerization Kinetics and Processes
Critically-Evaluated Propagation Rate Coefficients
in Free Radical Polymerizations - II. Alkyl Methacrylates
(Technical Report)
S. Beuermann and M. Buback
Synopsis: Propagation rate coefficients, kp, with confidence
ellipses of the Arrhenius parameters, are reported for bulk free-radical
homopolymerizations of n-butyl and n-dodecyl methacrylate
at ambient pressure and low conversion. The data which are from independent
experiments in two laboratories, were obtained by the pulsed-laser polymerization
/ size-exclusion chromatography method. They obey the consistency criteria
established for this technique. Plotting the n-butyl and n-dodecyl
methacrylate kp data together with the benchmark kp values
for methyl methacrylate and recent data for four other linear and branched
alkyl methacrylates clearly shows a pronounced family-type behaviour
of alkyl methacrylate kp.
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