Publicación: SÍNTESIS Y CARACTERIZACIÓN DE POLIURETANOS A PARTIR DE POLIOL-SUSPENSIONES ACEITE DE HIGUERILLA Y ALMIDÓN DE YUCA
Autor corporativo
Recolector de datos
Otros/Desconocido
Director audiovisual
Editor
Universidad Industrial de Santander
Fecha
Citación
Título de serie/ reporte/ volumen/ colección
Es Parte de
Descripción
Se sintetizaron materiales poliméricos, poliuretanos y sus respectivos IPNs poliuretano/poliestireno (PU/PS), a partir de polioies-suspensiones aceite de higuerilla-almidón de yuca, y metilen difenil diisocianato (MDi). La novedad se presentó en que los materiales fueron obtenidos de polioles-suspensiones derivados de una doble modificación: 1. El aceite de higuerilla inicialmente se modificó por reacción de transesterificación con peníaeritritol. 2. A los polioles obtenidos por transesterificación, se les incorporó almidón de yuca. Estos poíioi-suspensiones fueron caracterizados en índice de hidroxílo, viscosidad y gravedad especifica. Los materiales poliméricos obtenidos se caracterizaron en sus propiedades químicas (resistencia al ataque químico), físicas (módulo, esfuerzo máximo, elongación de ruptura y dureza), térmicas y morfología. Los resultados muestran que se obtuvieron materiales, a partir de ios polioies-suspensiones, con mejores propiedades, en comparación con los materiales sintetizados a partir de las rutas de modificación independientes (reacción de transesterificación e incorporación de almidón).
It was carried out a double modification of the castor oil by means of transesterification with pentaerythritol and later yucca starch incorporation, obtaining itself the denominated polyol-suspensions. These polyol-suspensions were characterized (hydroxyl value, viscosity and specific gravity) and from them, polyurethane elastomers and IPNs were synthesized; MDI (as diisocyanate) was used. The polymeric materials obtained were characterized (resistance to the tensión, hardness, chemical attack). The results show that the materials that were obtained from the polyol-suspensions have better properties, in comparison with the materials synthesized from the independent routes of modification (reaction of transesterificacion and starch incorporation).
It was carried out a double modification of the castor oil by means of transesterification with pentaerythritol and later yucca starch incorporation, obtaining itself the denominated polyol-suspensions. These polyol-suspensions were characterized (hydroxyl value, viscosity and specific gravity) and from them, polyurethane elastomers and IPNs were synthesized; MDI (as diisocyanate) was used. The polymeric materials obtained were characterized (resistance to the tensión, hardness, chemical attack). The results show that the materials that were obtained from the polyol-suspensions have better properties, in comparison with the materials synthesized from the independent routes of modification (reaction of transesterificacion and starch incorporation).


