Author/Authors :
Jacob، Daniel J. نويسنده , , Somma، E. نويسنده , , Loppinet، B. نويسنده , , Fytas، G. نويسنده , , Setayesh، S. نويسنده , , Grimsdale، A. C. نويسنده , , Müllen، K. نويسنده ,
Abstract :
The orientational relaxation function in non-dilute isotropic solutions of semi-rigid polymers with different ladder-type oligophenylene monomer structures is recorded by time domain depolarized light scattering. The shape and the peculiar dependence of this function on the scattering angle arise from the coupling between orientational and shear translational motions. At sufficiently high concentrations, this coupling facilitates the opening of a faster relaxation channel better resolved in the forward scattering. The overall shape of the relaxation function is concentration-dependent, and the strength of the coupling appears to be system-specific.
