PC 42

STRUCTURE OF DIBLOCK COPOLYMERS CONTAINING STYRENE, ACRYLONITRILE AND 5-VINYLTETRAZOLE UNITS

D. Gromadzki^a, J. Lokaj^a, P. Černoch^a, O. Diat^b, F. Nallet^c, P. Štěpánek^a

^a Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic

^b Structure et Propriétés d´Architectures Moléculaires, UMR 5819 (CEA-CNRS-UJF), DRFMC/SPrAM, CEA-Grenoble, 38054 Grenoble cedex 9, France

^c Centre de Recherches Paul-Pascal, CNRS, avenue du Docteur-Schweitzer,

F-33600 Pessac, France

Polystyrene-block-poly(styrene-co-acrylonitrile) block copolymers with various content of acrylonitrile were synthesized by nitroxide - mediated radical polymerization and post-functionalized using efficient "click" chemistry process.

The morphological behaviour of parent and modified, i.e. block copolymers containing 5-vinyltetrazole units, cast from tetrahydrofuran (THF) solutions were investigated by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The observed morphology was generally lamellar with a characteristic interlamellar distance in the range 60-70 nm.

Atomic force microscopy (AFM) was used to examine thin films spin-coated from dilute THF and dioxane solutions. Generally, films prepared from THF showed tendency to hole formations while films spin-coated from dioxane displayed lamellar or worm-like morphology.

Literature: D. Gromadzki, J. Lokaj, P. Černach, O. Diat, F. Nallet, P. Štěpánek, submitted to Eur. Polym. J.

Acknowledgement:

We acknowledge support by the Grant Agency of the Academy of Sciences of the Czech Republic (A4050403) and by the Grant Agency of the Czech Republic (SON/03/E001) within the EUROCORES Programme SONS of the European Science Foundation, which is also supported by the European Commission, Sixth Framework Programme. Support by the Marie - Curie - Research - Training - Network MCRTN-SOCON is gratefully acknowledged.