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Comparison between cure kinetics by means of dynamic rheology and DSC of formaldehyde-based wood adhesives

  • Comparative analysis of the chemical and rheological curing kinetics of formaldehyde-based wood adhesives is crucial for assessing their respective performance. Differential scanning calorimetry (DSC) and rheometry are the conventional techniques used for monitoring the curing processes leading to crosslinking polymerization of the adhesives. However, the direct comparison of these techniques is inappropriate due to the intrinsic differences in their underlying procedures. To address this challenge, the two adhesive samples were sequentially cured, firstly with rheometry and followed by DSC. The observed higher curing degree in the subsequent DSC procedure underpins the incomplete curing of the samples during initial rheometry. Furthermore, the comparative assessment of the activation energies, molar ratios, and active groups of the two adhesives highlights the importance of the pre-exponential factor in addition to the activation energies, as it attributes to the probability of active groups coinciding at the appropriate spatial arrangement.

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Author of HS ReutlingenKandelbauer, Andreas
Erschienen in:The journal of adhesion
Publisher:Taylor & Francis
Place of publication:London
Document Type:Journal article
Publication year:2024
Tag:DSC; conversion; curing kinetics; degree of cure; pre-exponential factor; rheology
Page Number:22
First Page:1
Last Page:22
Article Number:2300453
PPN:Im Katalog der Hochschule Reutlingen ansehen
DDC classes:530 Physik
Open access?:Nein
Licence (German):License Logo  In Copyright - Urheberrechtlich geschützt