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Dynamic mechanical thermal analysis of aqueous sugar solutions containing fructose, glucose, sucrose, maltose and lactose

2001Journal article Open access
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dc.contributor.authorCruz, Isabel B.
dc.contributor.authorOliveira, Jorge C.
dc.contributor.authorMacInnes, William M.
dc.date.accessioned2011-10-22T17:09:26Z
dc.date.available2011-10-22T17:09:26Z
dc.date.issued2001
dc.description.abstractThe glass transition of glucose, fructose, lactose, maltose and sucrose solutions at maximum cryo-concentration was studied by Dynamic Mechanical Thermal Analysis (DMTA), using the disc bending technique. The glass transition temperatures were determined from the peaks in the loss modulus E′′, which corresponds theoretically to the resonance point (Maxwell model) for several input frequencies. The frequency dependence was well described by both an Arrhenius-type model and by the WLF (Williams, Landel and Ferry) equation, yielding glass transition temperatures for an average molecular vibration time of 100 s, which were similar to published midpoint temperatures determined by DSC scans. Some sugar mixtures were studied, yielding results that were well described by the Gordon–Taylor equation, using literature data. The frequency dependence of the viscoelastic ratio was also well approximated by an Arrhenius-type equation, with activation energies similar to those of the glass transition temperature and corresponded well to published values of the endset of glass transition.por
dc.identifier.citationCRUZ, Isabel B. ; OLIVEIRA, Jorge C. ; MACINNES, William M. - Dynamic mechanical thermal analysis of aqueous sugar solutions containing fructose, glucose, sucrose, maltose and lactose. International Journal of Food Science & Technology. ISSN: 1365-2621. Vol. 36, n.º 5 (2001), p. 539–550por
dc.identifier.doi10.1046/j.1365-2621.2001.00484.x
dc.identifier.urihttp://hdl.handle.net/10400.14/6857
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWileypor
dc.subjectBiomaterials sciencepor
dc.subjectFrequency-response analysispor
dc.subjectGlass transitionpor
dc.subjectMolecular mobilitypor
dc.subjectWLF equationpor
dc.titleDynamic mechanical thermal analysis of aqueous sugar solutions containing fructose, glucose, sucrose, maltose and lactosepor
dc.typejournal article
dspace.entity.typePublication
person.familyNameOliveira
person.givenNameJorge
person.identifier.orcid0000-0002-0680-6174
person.identifier.ridC-2642-2008
person.identifier.scopus-author-id7202452289
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication5227bcfa-cb99-407e-a2ef-3f4eb86d4243
relation.isAuthorOfPublication.latestForDiscovery5227bcfa-cb99-407e-a2ef-3f4eb86d4243

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