Preparation and characterization of ten telomers formed from acrylate esters in reactions with methy! and ethyl mercaptans are reported. Determination of the first three telomerization chain transfer constants and the polymerization chain transfer constant for the methyl acrylate-ethanethiol system is also described. The two-unit transfer constant is. about equal to the polymerization constant, but the three-unit constant is substantially higher than ...