Abstract
The steady flow viscosity of cholesteryl oleyl carbonate was determined in a range of shear rate from 0.1 to 70 sec1 and over a temperature range from 15 to 45°C. A viscosity maximum associated with a marked non-Newtonian behaviour was observed at a temperature range around 31°C of the cholesteric-isotropic transition. The linearity of the flow curves in the cholestric mesophase suggested that the structure of the liquid crystal was easily broken by a fairly low shear stress. The measurements of the temperature dependence of the d.c. electrical conductivity, the optical transmittivity, and the dynamic rigidity were also carried out. According to Denny-Brodkey's theory, the equilibrium constants between broken and unbroken structures were estimated near the transition temperature.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
