Title:
Elucidating the nature of bonding in mechanical pulps

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dc.contributor.author Lehtonen, Lauri Kalevi en_US
dc.contributor.committeeMember Rudie, Alan
dc.contributor.committeeMember Page, Derek
dc.contributor.committeeMember Coffin, Douglas
dc.contributor.committeeMember Patterson, Timothy
dc.contributor.department Institute of Paper Science and Technology en_US
dc.date.accessioned 2005-08-04T16:50:57Z
dc.date.available 2005-08-04T16:50:57Z
dc.date.issued 2004-11 en_US
dc.description.abstract Bond strength is classically characterized into two separate factors; area of the bond and specific bond strength. This separation is especially important in pulps that lack strength properties, and are specifically used for their optical properties, such as mechanical pulps. In this research the applicability of the Ingmansson and Thode method for distinguishing between specific bonded area and specific bond strength in mechanical pulps is studied. It is shown that the rigid, non-collapsable, nature of the mechanical pulp can be overcome by press drying the sheets until they approach their 50% relative humidity moisture content. Mechanical pulps have been assumed to operate in a domain where fiber failure can be considered insignificant, and the bonded area to tensile strength relationship is linear. In this study it was shown that most commercial pulps operate in a significant fiber failure domain. However, it is shown that pure fines and fines rich mechanical pulp better follow a linear bonded area to tensile strength relationship rather than a non-linear (significant fiber failure) model, suggesting that only the fiber fraction undergoes fiber failure and the finer fractions predominantly bond failure. The Ingmansson and Thode method relies on the use of scattering coefficient as a measure of specific surface area. It is shown that scattering coefficient is an accurate estimate of mechanical pulp specific surface area at a constant wavelength of light, provided that the wavelength used to measure scattering coefficient is above the significant absorption limit. en_US
dc.description.degree Ph.D. en_US
dc.format.extent 25828050 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/7096
dc.language.iso en_US en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Pulp mixtures en_US
dc.subject Scattering coefficient en_US
dc.subject Fiber properties en_US
dc.subject Paper properties en_US
dc.subject Fines en_US
dc.subject Paper physics en_US
dc.subject Heterogeneous en_US
dc.subject Mechanical pulps en_US
dc.title Elucidating the nature of bonding in mechanical pulps en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.corporatename Institute of Paper Science and Technology
relation.isOrgUnitOfPublication 6c27e726-78e5-4645-8d27-6b6724df05af
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