Collect. Czech. Chem. Commun. 1989, 54, 1648-1660

The photochemical stabilization of block copolymer micelles

Karel Procházkaa, Kateřina Kupkováa, Jaroslav Burdab, Zdeněk Tuzarb and Bohumil Bednářc

a Department of Physical Chemistry, Charles University, 128 40 Prague 2, Czechoslovakia
b Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, 162 06 Prague 6
c Department of Polymers, Prague Institute of Chemical Technology, 166 28 Prague 6


Conditions of the polymolecular micellization of a linear three-block copolymer-polystyrene-block-polybutadiene-block-polystyrene in a binary solvent tetrahydrofuran-ethanol were determined. Photochemical stabilization of micelles by the crosslinking of polybutadiene chains in the cores induced by intense UV radiation was carried out in a tetrahydrofuran-ethanol mixture (34.5 vol. %), in which compact micelles with the polybutadiene core are formed and, at 25 °C, the micellization equilibrium is markedly shifted in favour of micelles containing a large number of associated copolymer chains. The kinetics of crosslinking of the micellar cores and the behaviour of stabilized micelles in solution were investigated.