SYNTHESIS OF AMPHIPHILIC TRIARM STAR BLOCK-COPOLYMERS

We describe the synthesis and the characterization of amphiphilic tria rm star block copolymers based on polystyrene, poly(methyl methacrylat e), poly(epsilon caprolactone), poly(L lactide) and poly(ethylene oxid e) blocks. This synthesis has been achieved by a new route consisting in 2 successive initiation steps on a core molecule (a 1,1 diphenyl et hylene derivative bearing a protected hydroxy function) located at the end of a first block. Some results on adsorption onto TiO2 and micell ization studies are given. Preliminary results on solid state indicate an increase of the miscibility of the different incompatible blocks.