Morphology of polystyrene-block-poly(styrene-co-acrylonitrile) and polystyrene-block-poly(styrene-co-acrylonitrile-co- 5-vinyltetrazole) diblock copolymers prepared by nitroxidemediated radical polymerization and ''click" chemistry - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Polymer Journal Année : 2008

Morphology of polystyrene-block-poly(styrene-co-acrylonitrile) and polystyrene-block-poly(styrene-co-acrylonitrile-co- 5-vinyltetrazole) diblock copolymers prepared by nitroxidemediated radical polymerization and ''click" chemistry

Résumé

Well-defined polystyrene-block-poly(styrene-co-acrylonitrile) PS-block-P(S-co-AN) and poly(styrene-co-acrylonitrile-co- 5-vinyltetrazole) PS-block-P(S-co-AN-co-5VT) block copolymers with various content of acrylonitrile units in the statistical block were synthesized by nitroxide mediated radical polymerization (NMRP) and post-functionalized using efficient ''click" chemistry process. In the second step, acrylonitrile units were successfully modified using 1,3-dipolar cycloaddition (''click" chemistry) type polymer analogue reaction. The original pristine diblock copolymers can be molecularly dissolved in THF and dioxane while the ''tetrazolated" versions aggregate to clusters as determined by dynamic light scattering (DLS). Small-angle X-ray scattering (SAXS) and Transmission Electron Microscopy (TEM) revealed ordered lamellar morphology with interlamellar spacing d = 60 nm increasing to d = 80 nm for ''tetrazolated" diblock copolymers. The morphological features of diblock copolymer thin layers observed by Atomic Force Microscopy (AFM) depend on the tunable content of both acrylonitrile and 5-vinyltetrazole units and on the quality (polarity) of the solvents used.

Dates et versions

hal-00690632 , version 1 (24-04-2012)

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Daniel Gromadzki, Jan Lokaj, Peter Cernoch, Olivier Diat, Frédéric Nallet, et al.. Morphology of polystyrene-block-poly(styrene-co-acrylonitrile) and polystyrene-block-poly(styrene-co-acrylonitrile-co- 5-vinyltetrazole) diblock copolymers prepared by nitroxidemediated radical polymerization and ''click" chemistry. European Polymer Journal, 2008, 44, pp. 189-199. ⟨10.1016/j.eurpolymj.2007.10.029⟩. ⟨hal-00690632⟩
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