抄録
Cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal) aqueous solution forms worm like micelles at a certain concentration ratio and shows remarkable viscoelastic properties. This solution causes flow-induced structure change in step shear flow. In this experiment, the flow-induced structure caused by sinusoidal shear flow was investigated. The time-dependent behavior of shear stress, flow birefringence, transmitted light intensity and dichroism was measured. When both shear rate and strain is exceeded the critical value for structure change, the all samples becomes opaque. At the first period, birefringence becomes remarkably large at the all samples with different CTAB/NaSal concentration ratio and some of them shows dichroism which is synchronized with shear rate.
