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The effect of high molecular weight polyacrylamide on the sedimentation behavior of kaolin in the presence of hydroquinone
Author(s) -
Şan Nuray Aksu,
Güven Olgun,
Güler Hülya
Publication year - 2000
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20001101)283:1<76::aid-mame76>3.0.co;2-0
Subject(s) - polyacrylamide , hydroquinone , sedimentation , intrinsic viscosity , dissolution , sedimentation coefficient , viscosity , materials science , aqueous solution , intermolecular force , hydrogen bond , chemical engineering , polymer chemistry , molecule , chemistry , polymer , organic chemistry , composite material , paleontology , sediment , engineering , biology , enzyme
The effect of high molecular weight polyacrylamide (PAAM; 5×10 6 ) and hydroquinone (HQ) on the sedimentation rate of kaolin suspensions was investigated by sedimentation, viscosimetric and UV spectrophotometric measurements. The sedimentation rates decreased exponentially with increasing HQ concentrations. PAAM solutions were prepared by dissolution of the same quantity of PAAM in aqueous HQ solutions with different concentrations. Viscosity of these solutions was observed to decrease exponentially with increasing HQ concentrations. Both the decrease in sedimentation rate and the viscosity were attributed to the reduction of the size of the macromolecular coil resulting from the breaking of intra‐ and intermolecular hydrogen bonds by HQ molecules. UV spectrophotometric results of the PAAM and HQ solutions were also in good accordance with the sedimentation and viscosimetric results.