The velocity profiles of isotropic and anisotropic solutions of hydroxypro-pylcellulose in water have been measured by a tracer method. The velocity profile is the usual linear one for steady state experiments and also for transient experiments if a short waiting time (less than 3 hours) is left between loading and the experiment. For long waiting times (more than 12 hours), the profile is S-shaped. This could be due to the establishment of a cholesteric superstructure
Velocity profiles in simple shear flow of liquid crystalline polymers / I., Sardi; Grizzuti, Nino; J. B., Riti; E., Thoelen; L., Vanrusselt; P., Navard. - In: LIQUID CRYSTALS. - ISSN 0267-8292. - STAMPA. - 12:4(1992), pp. 593-601. [10.1080/02678299208029095]
Velocity profiles in simple shear flow of liquid crystalline polymers
GRIZZUTI, NINO;
1992
Abstract
The velocity profiles of isotropic and anisotropic solutions of hydroxypro-pylcellulose in water have been measured by a tracer method. The velocity profile is the usual linear one for steady state experiments and also for transient experiments if a short waiting time (less than 3 hours) is left between loading and the experiment. For long waiting times (more than 12 hours), the profile is S-shaped. This could be due to the establishment of a cholesteric superstructureI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
