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Journal of Thermal Analysis and Calorimetry
Authors: G. Vázquez, F. López-Suevos, J. González-Alvarez, and G. Antorrena

Summary  

Phenol-urea-formaldehyde-tannin (PUFT) adhesives have been prepared by copolymerization at room temperature of pine bark tannins with phenol-urea-formaldehyde (PUF) prepolymers prepared under varying operating conditions. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) have been used to analyse the curing of prepolymers and adhesives. DSC curves were obtained at three different heating rates and, by means of the Model Free Kinetics isoconversional method, chemical conversion vs. time at a given temperature was obtained. Mechanical conversion was calculated from DMA storage modulus data for those adhesives which gave the best results for plywood and MDF boards.

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the chemical cure of phenolic resins [ 9 – 11 ] and tannin-based adhesives [ 12 – 14 ]. In addition, isoconversional methods [ 15 ] have been extensively used to describe complex kinetics of processes which involve multiple steps, as is the case of

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-018-1824-6 Moncrieff , J. ( 2007 ). The myth of the chemical cure: A critique of psychiatric drug treatment . New York, NY : Palgrave Macmillan . 10.1057/9780230589445 Noorani , T

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