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Abstract

The polymerization of methyl methacrylate (MMA) was initiated with 1,1,2,2-tetraphenyl-1,2-diphenoxyethane (TPPA), 1,1,2,2-tetraphenyl-1,2-bis(trimethylsiloxy)ethane (TPSA), and 1,1,2,2-tetraphenyl-1,2-dicyanoethane (TPCA). The polymerization with these initiators is characterised by three steps: in the first period oligomers from MMA and initiator radicals are formed by primary radical termination. These telechelics are effective initiators for the further free radical polymerization of MMA. After consumption of the initiator radicals with increasing conversion a normal polymerization occurs.