Open Access Repository

Evaluation of cationic polymers to control pitch deposition

McLean, DS, Stack, KR and Richardson, DE 2009 , 'Evaluation of cationic polymers to control pitch deposition', paper presented at the 63rd Appita Annual General Conference, 19-22 May 2009, Melbourne.

[img] PDF
3B31_McLean.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.


A wide range of cationic polymers of varying chemical structure, charge density and molar mass were evaluated for their effectiveness to control wood resin deposition. The ability of the polymers to attach model wood resin particles to thermo-mechanical pulp fibres and to maintain the wood resin in the colloidal phase was determined over a pH range of 4.75, 6.85 and 8.06. High molar mass poly-DADMAC, copolymer poly-(AM-co-DADMAC) and guar gum were found to be the best fixatives over the pH range investigated. The performance of poly-DADMAC was found to increase with molar mass and charge density.
A conceptual model was proposed to explain the behaviour of the polymers based on their ability to stabilise the wood resin colloids, to attach the wood resins to pulp fibres and to affect the wood resin particle size.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:McLean, DS and Stack, KR and Richardson, DE
Keywords: wood resins, pitch deposition, fixatives, cationic polymers
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page