J. Phys. II France
Volume 4, Numéro 2, February 1994
Page(s) 265 - 274
DOI: 10.1051/jp2:1994105
J. Phys. II France 4 (1994) 265-274

Dynamical properties of branched polymeric clusters in dilute regime

M. Delsanti1 and J. P. Munch2

1  Service de Chimie Moléculaire, CEA CE Saclay, 91191 Gif-sur-Yvette Cedex, France
2  Laboratoire d'Ultrasons et de Dynamique des Fluides Complexes URA C.N.R.S. N° 851, Université Louis Pasteur, 67070 Strasbourg Cedex, France

(Received 29 June 1993, accepted in final form 20 October 1993)

Static and dynamical properties of randomly branched polymers in dilute solutions were investigated by light scattering experiments. In the intermediate scattering regime, the main result is that the time dependence of the dynamical structure factor of the polymer is a function only of the reduced variable $\Omega t$, $\Omega$ being a characteristic frequency which varies with the scattering vector q as $q^{2.9\pm0.1}$ The dynamical behavior is very similar to that observed with linear polymers. This shows that branching does not affect dynamics, and hydrodynamic interactions between monomers are dominant as for linear polymers.

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