Surfactant-induced mesomorphic structures in flexible polymers
Technical Physics, Helsinki University of Technology, Rakentajanaukio 2 C,
FIN-02150 Espoo, Finland
2 Department of Polymer Chemistry and Materials Science Centre, University of Groningen - Nijenborgh 4, 9747 AG Groningen, The Netherlands
Accepted: 26 May 1996
During the last two years, mesomorphic structures for polyelectrolytes with ionically bound surfactants have been reported. This has now been extended to the case of hydrogen bonding. For poly (4-vinyl pyridine)-pentadecyl phenol ), the long period Lp of the lamellar structure is found to decrease as a function of x, in complete contrast to polyelectrolyte systems. Scaling arguments predict that the x-dependence of the long period is entirely due to the reduction in the thickness of the polymer layer and satisfies , as observed experimentally. Polyelectrolyte-surfactant complexes, on the other hand, are always locally fully complexed due to cooperative complexation with a corresponding x-independent long period.
PACS: 36.20.-r – Macromolecules and polymer molecules / 64.60.Cn – Order-disorder and statistical mechanics of model systems / 64.75.+g – Solubility, segregation, and mixing
© EDP Sciences, 1996