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The effect of molecular weight on the performance of paper strength-enhancing polymers
McMaster Ctr. for Pulp/Paper Res., Department of Chemical Engineering, McMaster University, Hamilton, Ont. L8S 4L7, Canada.
McMaster Ctr. for Pulp/Paper Res., Department of Chemical Engineering, McMaster University, Hamilton, Ont. L8S 4L7, Canada.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
SCA Research AB, SE-850 03 Sundsvall.
2001 (English)In: Journal of Pulp and Paper Science (JPPS), ISSN 0826-6220, Vol. 27, no 5, 145-151 p.Article in journal (Refereed) Published
Abstract [en]

The influence of dextran molecular weight (77 000 to 2 000 000) on the strength of fibre-fibre bonds was investigated. A series of cationic dextrans with different molecular weights, from 77 000 to 2 000 000, was prepared and the adsorption behaviour on fibre was characterized. The maximum amount of adsorbed dextran increased with decreasing molecular weight, while the adsorbed layer thickness on colloidal silica increased with increasing molecular weight. At saturation coverage, the molecular weight of dextran did nor affect the tensile strength of handsheets made from unbeaten bleached kraft pulp. The strength improvement with polymer addition did not correspond to increased optical bonded area (opacity). The external surface of fibre accessible to dextran of molecular weight 2 000 000 was estimated as 35 m(2)/g.

Place, publisher, year, edition, pages
2001. Vol. 27, no 5, 145-151 p.
Keyword [en]
Adsorption; Bleached Pulps; Chemical Bonds, Molecular Weight, Paper Making, Polymers, Tensile Strength
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-13595ISI: 000168548500001Scopus ID: 2-s2.0-0035336773OAI: oai:DiVA.org:miun-13595DiVA: diva2:412295
Note

Finns även som konferenstryck: Zhang, J., Pelton, R., Wågberg, L., & Rundlöf, M. (2001). The effect of molecular weight on the performance of paper strength enhancing polymers. Paper presented at the TAPPI Papermakers Conference, 811-827

Available from: 2011-04-21 Created: 2011-04-19 Last updated: 2016-10-13Bibliographically approved

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