The effect of water-soluble polymers on rheology of microfibrillar cellulose suspension and dynamic mechanical properties of paper sheet

Authors

  • Arja-Helena Vesterinen,

    1. Polymer Technology Research Group, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 6100, FIN - 02015 HUT, Helsinki, Finland
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  • Petri Myllytie,

    1. Forest Products Surface Chemistry Research Group, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 6400, FIN – 02015 HUT, Helsinki, Finland
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  • Janne Laine,

    1. Forest Products Surface Chemistry Research Group, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 6400, FIN – 02015 HUT, Helsinki, Finland
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  • Jukka Seppälä

    Corresponding author
    1. Polymer Technology Research Group, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 6100, FIN - 02015 HUT, Helsinki, Finland
    • Polymer Technology Research Group, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 6100, FIN - 02015 HUT, Helsinki, Finland
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Abstract

Rheological properties of fiber/polymer suspensions and dynamic mechanical analysis (DMA) of paper sheets containing the same polymers were measured. Correlations between viscoelastic properties of suspensions and strength of paper sheet are presented. Rheological properties of suspensions of microfibrillar cellulose (MFC) and a set of water soluble polymers were measured. Rheological properties of these complex fluids vary considerably depending on the added polymer. A suspension of fiber and carboxymethyl cellulose (CMC) exhibits a viscosity higher than the sum of the viscosity of the individual components in the suspension. In contrast, when cationic starch (CS) is used together with the fiber, the yielding behavior rather than the viscosity is characteristic of the suspension. Dynamic mechanical properties of paper sheets containing CMC or CS as additives were studied at different humidity levels. Different yielding behavior observed in oscillatory rheology can be correlated with straining behavior in dynamic mechanical properties. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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