The Visco-Elastic Properties of Solutions of Rod-Like Macromolecules

Publisher Website
Google Scholar
Abstract
The general theory of irreversible processes in solutions of macromolecules is employed to investigate the visco‐elastic behavior of solutions of rod‐like macromolecules. It is found that rotatory diffusional torques are responsible for three‐fourths of the stationary intrinsic viscosity. Under the action of periodic shear waves, the rotatory diffusional contribution to the stress exhibits relaxation phase lag and imparts a rigidity to the solution. As the frequency is increased, the intrinsic viscosity drops to one‐fourth of its stationary value and the rigidity modulus increases to an asymptotic value of 3RT/5 per mole/cm3 of solute.