Collect. Czech. Chem. Commun. 1987, 52, 1246-1255

Quasielastic light scattering from poly(styrene)-dibutyl phthalate solutions

Petr Štěpánek and Čestmír Koňák

Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, 162 06 Prague 6


Temperature and concentration behaviour of the dynamic structure factor of poly(styrene) was measured in a marginal solvent (dibutyl phthalate) by quasielastic light scattering. Both the concentration and temperature dependences of the hydrodynamic radius of the polymer coil and of the hydrodynamic blob size were found to follow the scaling laws predicted by theory. A relation m + b = -1 between exponents m and b for the concentration and temperature dependence of the blob size in semidilute solutions has been derived, and its validity was checked experimentally.