Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/10525
Title: Use of New Branched Cationic Polyacrylamides to Improve Retention and Drainage in Papermaking
Authors: Antunes, Elisabete 
Garcia, Fernando A. P. 
Ferreira, Paulo 
Blanco, Angeles 
Negro, Carlos 
Rasteiro, M. Graça 
Issue Date: 3-Dec-2008
Publisher: American Chemical Society
Citation: Industrial & Engineering Chemistry Research. 47:23 (2008) 9370-9375
Abstract: Cationic polyacrylamides of very high molecular weight and with different charge densities and degrees of branching have been investigated as retention aids for papermaking. The effects of polymer charge density and polymer branching on drainage and retention of a suspension containing fibers and precipitated calcium carbonate have been correlated with flocs properties. Additionally, the effects of flocculant dosage and contact time with the furnish were investigated. Results show that polymers of medium charge density are more adequate to be used as retention aids since lower drainage time and higher filler retention are obtained at short contact time and low flocculant dosage. The branched polymers exhibited better performance than the linear polymers: drainage performance is significantly improved because highly branched polymers produce small flocs with a more open structure.
URI: http://hdl.handle.net/10316/10525
ISSN: 0888-5885
DOI: 10.1021/ie801216t
Rights: closedAccess
Appears in Collections:FCTUC Eng.Química - Artigos em Revistas Internacionais

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