Regularities of the formation of acrylonitrile-acrylamide copolymers obtained from initial mono mer feeds containing 1-50 wt % acrylamide in DMSO solutions with the participation of low molecular mass and polymeric trithiocarbonates as reversible addition fragmentation chain transfer agents are studied for the first time. It is shown that the copolymerization in the presence of low molecular mass trithiocarbonates pro ceeds via a pseudo living mechanism. The synthesized copolymers prove to be inefficient as reversible addi tion fragmentation chain transfer agents, a result that leads to products with bimodal molecular mass distri butions. The rheological characteristics of solutions, as well as the thermal behavior of the copolymers obtained in the absence and in the presence of reversible addition fragmentation chain transfer agents, are studied. The effect of the synthesis conditions on the properties of the synthesized copolymers is discussed.

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