About the endothermal transitions of galactomannans: A multi-analytical DSC, LF-1H NMR and DMA study

• Published in: Carbohydrate polymers Vol. 211; pp. 31 - 38
• Main Authors: Busch, Verónica M., Santagapita, Patricio R., Díaz-Calderón, Paulo, Enrione, Javier I., Buera, M. Pilar
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.05.2019
• Subjects: Biopolymer; biopolymers; Differential scanning calorimetry; Dynamic mechanical analysis; Enthalpic relaxation; foods; galactomannans; glass transition; Guar gum; Low field 1H NMR; mechanical properties; nuclear magnetic resonance spectroscopy; temperature; water content; Guar gum (PubChem CID: 44134661); Differential scanning calorimetry; Low field 1H NMR; Guar gum; Biopolymer; Galactomannan (PubChem CID: 439336); Enthalpic relaxation; Dynamic mechanical analysis

[Display omitted] •3 endothermal transitions of galactomannans were observed in DSC thermograms.•Low ΔCp, wide ΔT and no typical wc dependence complicated Tg assignment.•An enthalpic relaxation-type transition around 50 °C was wc & frequency independent.•NMR T2 temperature dependence changed clo...