About the Experimental Determination of the Persistence Length of Wormlike Chains of Polystyrene

A. Brûlet , François Boué , J. Cotton

This article describes a fitting method allowing to determine the persistence length of a wormlike Kratky-Porod chain. The form factor of a flexible polymer chain is measured by means of a scattering technique. Its theoretical expression is composed of the exact calculations of des Cloiseaux for an infinite chain and of the approximated function of Sharp and Bloomfield valid for a finite chain. Two examples of the determination of b illustrate this method : one describes a polyion in a semi dilute solution without salt, the other a polystyrene chain in its melt.

Domaines: Articles anciens

A. Brûlet, François Boué, J. Cotton. About the Experimental Determination of the Persistence Length of Wormlike Chains of Polystyrene. Journal de Physique II, 1996, 6 (6), pp.885-891. ⟨10.1051/jp2:1996217⟩. ⟨jpa-00248338⟩