Addition of polystyryl radicals from TEMPO-terminated polystyrene to C60

Living polystyrene with TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) end groups and C-60 in molar ratios of 1:1 to 4:1 were heated in 1,2-dichlorobenzene solutions to 80-130 degreesC to produce polymers containing C-60 units. Multidetector size exclusion chromatographic (SEC) analyses of the recovered polymers showed molar masses corresponding with one, two, and sometimes three of the polystyrene chains. The one-chain components were mixtures of fullerene-containing and fallerene-free macromolecules. The two-chain components contained an average of one fullerene unit per macromolecule, and the three-chain components contained an average of more than one fullerene per macromolecule. Analogy to low molar mass diadducts of alkyl radicals to C-60 indicates that the polymeric diadducts are isomeric mixtures.