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Evaluation of cationic polymers to control pitch deposition
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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
at pH 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
|Keywords:||wood resins, pitch deposition, fixatives, cationic polymers|
|Journal or Publication Title:||Appita Journal|
|Page Range:||pp. 199-205|
Copyright © 2010 Appita
|Date Deposited:||03 Mar 2011 01:17|
|Last Modified:||03 Mar 2011 01:17|
|Item Statistics:||View statistics for this item|
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