Abstract
The time-dependent rheological behavior of a mixed micellar solution of tetradecyldimethylaminoxide and sodium dodecylsulfate with added salt is studied. Upon applying a constant shear flow, the shear stress begins to increase with time after an extraordinarily long initial induction period (on the order of tens of seconds) which is inversely proportional to the shear rate. The stress eventually reaches a plateau which fluctuates randomly over a narrow range, and the time required to achieve this decreases with shear rate according to a power law. The flow birefringence and extinction angle are also measured as a function of time. The unusually slow buildup of stress occurs only if the applied shear rate exceeds a critical value above which shear thickening takes place. It is suggested that shear induced coagulation among rodlike micelles as a kinetic process is consistent with the experimental observations.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
