Studies on the preparation of telechelic polymers by atom transfer radical polymerization and cross coupling processes


DURMAZ Y. Y. , CIANGA I., Yagci Y.

E-POLYMERS, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Basım Tarihi: 2006
  • Dergi Adı: E-POLYMERS

Özet

Combination of Atom Transfer Radical Polymerization ( ATRP) and Atom Transfer Radical Cross Coupling (ATRCC) processes as a route to prepare telechelic polymers was described. The concept is based on the activation of the dormant species at the chain ends of polystyrene (Br-PS-Br or PS-Br) prepared by ATRP and functional ATRP initiator (F-R-Br) in the absence of a monomer. Depending on the type of polystyrene used in the system, cross coupling of these active species gives alpha,omega-polystyrene and omega-polystyrene telechelics. Detailed investigations using a model system revealed that the efficiency of functionalization was not very high because of the self-coupling of the species derived from the polymer and functional initiator. However, the highest functionalization (X-f = 0.85) was achieved by introducing a small amount of styrene in the ATRCC.