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Síntesis Y Caracterización De Poliuretanos a Partir De Poliol-suspensiones Aceite De Higuerilla Y Almidón De Yuca
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pulido, Jorge Enrique Ramírez, Álvaro Mendoza Valero, Manuel F. Cabrera, Juan Monzó Navas, Kaja Bantha Cheng, Zhengdong |
| Copyright Year | 2006 |
| Abstract | RESUMEN Se sintetizaron materiales polimericos, poliuretanos y sus respectivos IPNs poliuretano/poliestireno (PU/PS), a partir de polioies-suspensiones aceite de higuerilla-almidon de yuca, y metilen difenil diisocianato (MDi). La novedad se presento en que los materiales fueron obtenidos de polioles-suspensiones derivados de una doble modificacion: 1. El aceite de higuerilla inicialmente se modifico por reaccion de transesterificacion con peniaeritritol. 2. A los polioles obtenidos por transesterificacion, se les incorporo almidon de yuca. Estos poiioi-suspensiones fueron caracterizados en indice de hidroxilo, viscosidad y gravedad especifica. Los materiales polimericos obtenidos se caracterizaron en sus propiedades quimicas (resistencia al ataque quimico), fisicas (modulo, esfuerzo maximo, elongacion de ruptura y dureza), termicas y morfologia. Los resultados muestran que se obtuvieron materiales, a partir de ios polioies-suspensiones, con mejores propiedades, en comparacion con los materiales sintetizados a partir de las rutas de modificacion independientes (reaccion de transesterificacion e incorporacion de almidon). Palabras claves: Aceite de higuerilla, Doble modificacion, Almidon de yuca, IPN, Elastomero de poliuretano ABSTRACT 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 tension, 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). Keywords: Castor oil, Doubie modification, Yucca starch, IPN, Poiyurethane elastomer |
| Starting Page | 7 |
| Ending Page | 11 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| Volume Number | 19 |
| Alternate Webpage(s) | https://www.redalyc.org/pdf/3420/342030277002.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |