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Thoma, C; Solt-Rindler, P; Sailer-Kronlachner, W; Rosenau, T; Potthast, A; Konnerth, J; Pellis, A; van Herwijnen, HWG.
(2021): Carbohydrate-hydroxymethylfurfural-amine adhesives: Chemorheological analysis and rheokinetic study
POLYMER. 2021; 231, 124128 FullText FullText_BOKU

Carbohydrates as a component in adhesive formulations have been reported for many years. A rapid cure at moderate temperatures is a remaining challenge in the development of renewable adhesives. Rheology provides insight into all stages of structure formation of a cured polymer. This work analyses the curing of carbohydrate-amine adhesives with and without the addition of 5-hydroxymethylfurfural (HMF) as a biomass-derived key reactant in adhesives. Isothermal and non-isothermal rheological measurements were performed to characterize i) the rheology of the prepolymer, ii) the initial stages of curing, iii) the sol-gel transition, and iv) general rheokinetics. The viscosity profile was described by empirical models and showed a deviation from homogeneous curing. Rheokinetic analysis using isoconversional methods and Arrhenius plots showed that HMF reduces the activation energy of the curing reaction. The addition of 5 mol.-% HMF (based on starting fructose content) increases the reactivity by lowering the activation energy of the curing.
Authors BOKU Wien:
Konnerth Johannes
Pellis Alessandro
Potthast Antje
Rosenau Thomas
Rosenfeld Catherine
Sailer-Kronlachner Wilfried
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Find related publications in this database (Keywords)
Rheokinetics carbohydrates

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