Block copolymers by transformation of living anionic polymerization into controlled/"living' atom transfer radical polymerization

Acar M., Matyjaszewski K.

MACROMOLECULAR CHEMISTRY AND PHYSICS, cilt.200, sa.5, ss.1094-1100, 1999 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 200 Konu: 5
  • Basım Tarihi: 1999
  • Sayfa Sayıları: ss.1094-1100


A method for the transformation of living anionic polymerization (LAP) to controlled/"living" atom transfer radical polymerization (ATRP) is reported and utilized for the preparation of block copolymers. The macroinitiators, polystyrene and polystyrene-block-polyisoprene containing the 2-bromoisobutyryl end group (PS-Br, (M) over bar(n) = 12200, (M) over bar(w)/(M) over bar(n) = 1.04; PS-b-PIP-Br, (M) over bar(n) = 16 800, (M) over bar(w)/(M) over bar(n) = 1.03), were prepared by LAP of styrene and styrene/isoprene, correspondingly, and suitable termination agents. These compounds were used as macroinitiators for controlled/"living'' ATRP to prepare block copolymers with methyl acrylate (PS-b-PMA), butyl acrylate (PS-b-PBA), methyl methacrylate (PS-b-PMMA), a mixture of styrene and acrylonitrile (PS-b-P(S-r-AN)) and also chain extension with styrene (PS-b-PS and PS-b-PIP-b-PS). The block copolymers were characterized by means of size exclusion chromatography, H-1 NMR and FT-IR spectroscopy.