INVESTIGADORES
RITACCO Hernan Alejandro
congresos y reuniones científicas
Título:
Equilibrium and Surface rheology of monolayers of polycations with side chains
Autor/es:
B. MIRANDA; F. ORTEGA; H.M. HILLE; H. RITACCO; D. RADIC; L. GARGALLO; N. BECERRA; V. M. SFERRAZZA
Lugar:
Coimbra, Portugal
Reunión:
Simposio; Polyelectrolytes 2008: 7th International Symposium on Polyelectrolytes; 2008
Institución organizadora:
University of Coimbra
Resumen:
The surface rheology of monolayers of polyelectrolyte ate the air/water interface, has been studied. Poly(4-vinyl n-tetradecylpyridinium) bromide with different degrees of quaternization were synthesized and characterized by stress relaxation and oscillatory strain experiments. The ishoterms present several phase transitions: at low monolayer coverage there is a phase transition showing a characteristic area that increases on increasing the quartenization degree. This behaviour can be rationalized in terms of a mean-field theory of 2D semiflexible polymeric chains.
