Determination of Intramolecular Chain Transfer and Midchain Radical Propagation Rate Coefficients for Butyl Acrylate by Pulsed Laser Polymerization

摘要: A novel method to extract individual free-radical polymerization rate coefficients for butyl acrylate intramolecular chain transfer (backbiting), kbb, and monomer addition the resulting midchain radical, , is presented. The approach measuring kbb does not require knowledge of any other coefficient. Only dispersion parameter SEC broadening has be determined by fitting measured MWDs or should available from separate experiments. based upon analysis shift in position inflection point polymer molecular weight distributions produced a series pulsed-laser (PLP) experiments with varying laser pulse repetition rate. coefficient onset sharp decrease apparent propagation ( ) decreasing rate, an verified simulation. With performed between −10 +30 °C, estimated values are fitted well Arrhenius relation pre-exponent...