RHEOLOGICAL STUDIES ON MACALOID DISPERSIONS .1. EFFECT OF ELECTROLYTES

The effect of sodium chloride, calcium chloride and aluminum chloride on the rheological characteristics of macaloid dispersions was studied . The theological study included investigation of the phenomena of con sistency, thixotropic breakdown and structural recovery in the station ary state. The consistency of Macaloid dispersions was found to increa se in the presence of these electrolytes; this increase was proportion al to both concentration and valency of the electrolyte. The swelling ability of Macaloid was suppressed by the electrolytes in a manner pro portional to their concentration. The thixotropic breakdown induced by increasing rate of shear was increased by the electrolytes, while tha t by shearing was affected differently by the different electrolytes. The rate of structural recovery was affected differently by the differ ent concentrations of the electrolytes; however, almost all systems at tained complete recovery after a rest for 1 h.