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New Retention Aids (1) : Flocculation Behavior
( Jong Ho Shin ),( Sin Ho Han ),( Chang Man Sohn ),( Say Kyoun Ow ),( Souk Il Mah ) 한국공업화학회 1993 한국공업화학회 연구논문 초록집 Vol.1993 No.0
Copolymerization of acrylamide(AM) and dimethylaminoethylacrylate methylchloride(DMAEA) was initiated by ammonium persulfate(AP) in the presence of the polymerizable precursor, pentaerythritol triacrylate(PETA), synthesized from pentaerythritol(PETOL) and acrylic acid(AA). Flocculation of ground calcium carbonate and titanium dioxide particles by cationic tri-armed star-like polymers of relatively low molecular weight has been investigated and compared with that by conventional linear polyelectrolytes with special attention being paid to the effect of polymer concentration and shear condition. Also the effect of microparticle addition on flocculation has been examined. The star-like polymers produced small floes with great shear resistance, and the floe size could be increased further by adding microparticulate silica. Based on the experimental results a tail bridging mechanism has been proposed for the star-like polymers.