Temperature Dependence of Styrene Polymerizations Initiated by Cp2TiCl from Epoxides, Aldehydes and Peroxides

摘要

The ability of living radical polymerization (LRP) to control molecular weight and polydispersity via a reversible termination of propagating chains has enabled its wide applications in the synthesis of complex macromolecular structures. Catalytic systems based on late transition persistent metal radicals have proven very successful in LRP. Thus, atom transfer radical polymerization is accomplished by Cu, Ni, Fe, or Ru1,2 complexes while the organometallic LRP is mediated by Co,3a Te,3b Sb3c and Mo.d As these systems typically employ only activated halides or thermal initiators1a,ba broader selection of initiators and catalysts is still desirable.