Journal of Food Science · 1999 · 46 citations · 9 references
Natural SciencesChemistryMaterials SciencePolymer ChemistryPolymer MaterialsSpectroscopyGlass MaterialsMagnetic Resonance SpectroscopyPhase ChangePhase TransitionsPolymer CharacterizationPolymer PhysicsGlass TransitionGlass Transition Temperature DeterminationMagnetic Resonance Relaxation TimesNuclear Magnetic Resonance RelaxationProton RelaxationRelaxation BehaviorRelaxation Time MeasurementsTransverse Relaxation Time
ABSTRACT A pulse nuclear magnetic resonance (NMR) technique was used to study the glass transition in maltodextrins. The spin‐lattice relaxation time ( T 1 and spin‐spin relaxation time ( T 2 ) of different molecular weight maltodextrins at different moisture contents and temperatures were measured using the pulse NMR tech nique. T 1 , and T 2 were plotted against temperatures. From the resultant curves, the state transitions were observed and the corresponding state transition temperatures were determined. The state transition temperatures were very close to the glass transition temperatures ( T g s) determined with differential scanning calorimetry, suggesting a strong relationship between glass transition and proton relaxation behavior. Results indicate pulse NMR‐based instrumentation could be very effective for the study of glass transition in food polymers.
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The glass transition in starch
Kathleen Zeleznak, R. C. Hoseney · 1987 · 433 citations
The glass transition of amylopectin measured by DSC, DMTA and NMR
Monica T. Kalichevsky, E. Jaroszkiewicz, S. Ablett et al. · Carbohydrate Polymers · 1992 · 388 citations