Orientational–deformational nature of flow birefringence in solutions of rigid‐chain polymers

Abstract

The orientational–deformational nature of flow birefringence (FB) in solutions of rigid‐chain polymers is confirmed experimentally. The possibility of a direct determination of the internal viscosity parameter by the dependence of the FB relaxation time on the solvent viscosity is demonstrated. Indirect manifestation of internal viscosity in the FB relaxation time is confirmed by the dependence of the form factor on the degree of coiling. © 1993 John Wiley & Sons, Inc.

Structure and Dynamics of the Polyelectrolyte Complex Formation

“…FB measurements were carried out by the photoelectric compensation method with phase modulation. 40 The intensity of light passing through the crossed polarizer and analyzer was determined by the combined action of the anisotropic layer in the Couette cell, the compensator, and photoelastic modulator with the slow axis oriented at 45°relative to the analyzer axis. The frequency of modulation was 17 kHz.…”