Regensburg 2002 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 14: Poster: Kolloidale Systeme

CPP 14.2: Poster

Mittwoch, 13. März 2002, 16:30–18:00, B

Polymer-surfactant interactions: Effect of surfactant concentration on the polymer conformation and aggregation size — •H. Zettl¹, O. Korenberg², M. Gottlieb², and G. Krausch¹ — ¹Physikalische Chemie II, Universität Bayreuth, 95440 Bayreuth, Germany — ²Chemical Engineering Department, Ben Gurion University, Beer Sheva 84105, Israel

Association between polymers and surfactants has drawn much attention in the last decades. Mixed aggregates are formed already at low surfactant concentrations. Such aggregates can dramatically change the solution properties, which in turn affords a variety of industrial applications (e.g. cosmetics and paints). In this work we study a system containing an anionic surfactant (SDS) and a nonionic polymer (methyl cellulose) in water. Fluorescence correlation spectroscopy (FCS) was used to study the aggregation behaviour. The results were compared with measurements of electrical conductivity an viscosity.