Abstract
The effect of a series of polyacrylic acids, ranging in molecular weight from 1.67×104 to 2.36×106, on the stability of positively charged silver iodide particles has been examined. Flocculation of the sol occurred at a well defined concentration of polyacrylic acid,c f , and a further increase in concentration of the polyelectrolyte caused restabilization of the sol. Over the range examinedc f appeared to be related to the viscosity average molecular weight of the acid,M v , by an equation of the form,c f =a ·M v − b wherea andb are constants.
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