Abstract
The photochemistry of the polymerization initiators ω,ω-dimethoxy-ω-phenyl-acetophenone (A) and ω,ω-diethoxy-acetophenone (B) has been studied by 1H-, 2D- and 13C-CIDNP-experiments. In some radical scavenging experiments the competition between reactions among initiator radicals and reactions of initiator radicals with the monomer acrylic acid methyl ester was observed at low monomer concentrations. These experiments give insight into the first steps of the polymerization process.
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