화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.8, No.2, 131-137, March, 2002
Export Citation
Flocculation Characteristics of Copolymer of Acrylamide with Quaternary Ammonium Cationic Monomer (Running) Flocculation by Cationic polyacrylamide
Mi Suk Cho, Bong Keun Song1, and Ki June Yoon†
  • Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
  • 1Pulp and Paper Research Center, Korea Research Institute of Chemical Technology, Taejon 305-600, Korea
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Copolymers of acrylamide (AM) and acryloyloxyethyl dimethylbenzyl ammonium chloride (AODBAC) synthesized by dispersion polymerization in aqueous media were evaluated as flocculents and retention aids in papermaking. The flocculation of a model CaCO3 suspension was monitored by measuring the floc size using a particle size analyzer. The effects of the molecular weight, copolymer, and shear on flocculation were investigated. The cationic copolymers exhibited an improved flocculation behavior compared to the homopolymer, polyacrylamide, plus the floc size increased with an increase in the molecular weight. The copolymers showed also a better shear resistance than the homopolymer. The flocculation was more sensitive to the molecular weight of the copolymers than to the copolymer composition or charge density of the copolymers. It was also shown that the copolymers prepared in a dispersed state could be applied as efficient retention aids in papermaking.
Keywords:acrylamide (AM);acryloyloxyethyl dimethylbenzyl ammonium chloride (AODBAC);dispersion polymerization;flocculation;retention aid
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