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Self-assembled poly(4-vinylpyridine) - Surfactant systems using alkyl and alkoxy phenylazophenols

de Wit, J., van Ekenstein, G. A., Polushkin, E., Kvashnina, K., Bras, W., Ikkala, O. & ten Brinke, G., 24-Jun-2008, In : Macromolecules. 41, 12, p. 4200-4204 5 p.

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  • Joost de Wit
  • Gert Alberda van Ekenstein
  • Evgeny Polushkin
  • Kristina Kvashnina
  • Wim Bras
  • Olli Ikkala
  • Gerrit ten Brinke

Para-substituted alkyl and alkoxy phenylazophenols (PAP's) have been synthesized and used as hydrogen-bonded side chains for poly(4-vinylpyridine)-based comb-shaped supramolecules akin to the well-studied poly (4-vinylpyridine)/pentadecyl phenol systems. In this paper we report the self-assembly of these new materials as investigated by DSC and simultaneous SAXS/WAXS. The systems exhibit smectic ordering with a periodicity in the range of 3.0-4.2 nm. The periodicity length scale, the order-disorder transition temperature (T-ODT), and the glass transition temperature T-g of the self-assembled systems all increase with increasing alkyl chain length. The correlation between T-ODT and T-g observed is argued to be the consequence of the increasing segregation in the self-assembled systems with increasing alkyl tail length of the amphiphiles.

Original languageEnglish
Pages (from-to)4200-4204
Number of pages5
JournalMacromolecules
Volume41
Issue number12
Publication statusPublished - 24-Jun-2008

    Keywords

  • SIDE-CHAIN POLYMERS, LIQUID-CRYSTAL, POLYELECTROLYTE, COMPLEXES, COPOLYMERS, PHASE, TRANSITIONS, SEGREGATION, TEMPERATURE, SCATTERING

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