Determination of vinyl acetate propagation rate coefficients via high frequency pulsed laser polymerization

Abstract

New data on the propagation rate coefficient, kp, of vinyl acetate (VAc) are obtained via the IUPAC recommended method of pulsed laser polymerization size exclusion chromatography (PLP-SEC) operated at 500 Hz laser repetition rate. An apparent dependency of the experiment's outcome on the laser pulsing rate Is identified with kp being about 25 % larger at 500 Hz compared to 100 Hz. The temperature dependence of kp was determined to fit In kp = 17.12 - 2621 K/T; data Is in generally good agreement with literature values when the previous underestimation of kp by 100 Hz laser pulsing experiments is taken Into account.