EPR Analysis of n-Butyl Acrylate Radical Polymerization.

  title={EPR Analysis of n-Butyl Acrylate Radical Polymerization.},
  author={Johannes Barth and Michael M Buback and Pascal Hesse and Tatiana Yu Sergeeva},
  journal={Macromolecular rapid communications},
  volume={30 23},
Via electron paramagnetic resonance (EPR) spectroscopy, concentrations of secondary propagating radicals (SPRs) and tertiary mid-chain radicals (MCRs) in n-butyl acrylate solution polymerization were measured. The EPR spectrum is dominated by the 4-line spectrum of SPRs at -50 °C and by the 7-line spectrum of MCRs at +70 °C. At intermediate temperatures, a third spectral component is seen, which is assigned to an MCR species with restricted rotational mobility. The MCR components are produced… CONTINUE READING