Grafting of polyacrylamide on to guar gum using K2S2O8 ascorbic acid redox system

The grafting of polyacrylamide on to guar gum in aqueous medium initiated by the potassium persulfate/ascorbic acid redox system has been studied gravimetrically at the temperature 35 ± 0.2°C in the presence of atmospheric oxygen and Ag+ ions. The rate of grafting was found to increase with temperat...

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Veröffentlicht in:	Journal of applied polymer science 1990-06, Vol.39 (11-12), p.2187-2204
Hauptverfasser:	Bajpai, U. D. N., Jain, Alka, Rai, Sandeep
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Exact sciences and technology Organic polymers Physicochemistry of polymers Preparation, kinetics, thermodynamics, mechanism and catalysts
Online-Zugang:	Volltext
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Zusammenfassung:	The grafting of polyacrylamide on to guar gum in aqueous medium initiated by the potassium persulfate/ascorbic acid redox system has been studied gravimetrically at the temperature 35 ± 0.2°C in the presence of atmospheric oxygen and Ag+ ions. The rate of grafting was found to increase with temperature, concentration of redox components, acrylamide, and guar gum. But at higher concentration of guar gum, the rate of grafting was found to decrease. A mechanism for grafting and suitable rate expression have been suggested.
ISSN:	0021-8995 1097-4628
DOI:	10.1002/app.1990.070391101