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Evaluation of cationic polymers to control pitch deposition


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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.

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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

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
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