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Technologies pour résines MUF de haute performance avec un taux faible de mélamine

Abstract : The characteristics of aminoplastic resins for particleboard applications have been improved throught a number of technologies. It was explained how some molecules, such as hexamethylenetetramine, methylal and melamine acetate, improve the performances of the adhesives. New additives were also tested : para-toluene sulphonic/morpholine, acetals, The effect of additives onto physical, chemical and mechanical properties was investigated by thermomechanical analysis, nuclear magnetic resonance spectroscopy, low angle light laser scattering, polarized light optical microscopy and by manufacturing wood particleboards. It appears that the process used to synthesize melamine- urea-formaldehyde resins has some influence on the effect of additives on the behaviour of the resin. Some compounds as acetals increase melamine solubility and disrupt colloidal aggregations. Other compounds, as hexamethylenetetramine, have a buffering effect which allows to improve " hardening-degradation " equilibrium.
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Submitted on : Thursday, March 29, 2018 - 10:39:51 AM
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  • HAL Id : tel-01746534, version 1


Michela Zanetti. Technologies pour résines MUF de haute performance avec un taux faible de mélamine. Autre. Université Henri Poincaré - Nancy 1, 2003. Français. ⟨NNT : 2003NAN10063⟩. ⟨tel-01746534⟩



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