Interaction between polyelectrolytes and heteropolar precipitates

The interactions of some polyelectrolytes (anionic–gum arabic, agar; ampholytic–gelatin) with silver bromide sol in statu nascendi were studied. It was found that there are analogous phenomena to those encountered with usual hydrophobic sols. The polyelectrolyte effects on hydrophobic systems were t...

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Bibliographic Details
Published in:Journal of polymer science 1954, Vol.12 (1), p.221-227
Main Authors: Težak, Božo, Kratohvil, Stanka
Format: Article
Language:English
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Summary:The interactions of some polyelectrolytes (anionic–gum arabic, agar; ampholytic–gelatin) with silver bromide sol in statu nascendi were studied. It was found that there are analogous phenomena to those encountered with usual hydrophobic sols. The polyelectrolyte effects on hydrophobic systems were treated in a manner usual for simple electrolytes. The appearance of the typical coagulation curves with maximum is used for the characterization of various systems: hydrophobic colloid–polyelectrolyte–electrolyte. Depending upon the position of the system on “stabilizing” or “sensitizing” side of this maximum (sometimes of minimum), there is a very pronounced difference of the polyelectrolyte action on the coagulation value of simple electrolyte. Thus, on the “stabilizing” side, the “reverse” antagonism was found, which is explained as a result of the dominating polyelectrolyte adsorption effect.
ISSN:0022-3832
1542-6238
DOI:10.1002/pol.1954.120120118