Portal del Investigador
Curing characterization of Urea Formaldehyde resins by Differential Scanning Calorimetry (DSC) Caracterizacion del curado de resinas Urea Formaldehido por Calorimetría Diferencial de Barrido (DSC)
Keywords: temperature, thermodynamics, polymerization, synthesis, formaldehyde, urea, drug, article, catalyst, resin, analysis, cross, differential, calorimetry, thermography, scanning, linking, chemical, unclassified, polynoxylin
Abstract
Urea Formaldehyde resins were prepared in a two step condensations process with molar ratios of Formaldehyde/Urea that fluctuated between 1.10 - 1.40. The thermal behavior of the curing process was studied by Differential Scanning Calorimetry (DSC) under different environmental conditions. The DSC thermograms of UF resins, with NH4Cl as catalyst, showed that main crosslinking reactions, for resins with low molar formaldehyde levels, took place at 100°C. Crosslinking reactions, for resins without catalyst or with high formaldehyde molar ratios, took place at temperature between 120 - 180°C.
Más información
| Título según SCOPUS: | Curing characterization of Urea Formaldehyde resins by Differential Scanning Calorimetry (DSC) [Caracterizacion del curado de resinas Urea Formaldehido por Calorimetría Diferencial de Barrido (DSC)] |
| Título de la Revista: | BOLETIN DE LA SOCIEDAD CHILENA DE QUIMICA |
| Volumen: | 47 |
| Número: | 1 |
| Editorial: | Sociedad Chilena de Química |
| Fecha de publicación: | 2002 |
| Página de inicio: | 33 |
| Página final: | 38 |
| Idioma: | Spanish |
| URL: | http://www.scopus.com/inward/record.url?eid=2-s2.0-0036489363&partnerID=q2rCbXpz |
| Notas: | SCOPUS |