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handle: 10261/348022
En la actualidad, uno de los grandes problemas presentes en el sector de la construcción es el del pinchazo de neumáticos de vehículos de obra civil, puesto que supone pérdidas económicas considerables. Como solución a este inconveniente, en el marco del presente trabajo, se ofrece un tipo particular de poliuretanos elastoméricos, y más específicamente los ultrablandos. Las propiedades de estos rellenos de neumáticos se modularon a partir de cambios en la composición de los poliuretanos flexibles: catalizador, distribución de plastificante y exceso de isocianato. La caracterización de los nuevos materiales sintetizados se realizó mediante técnicas avanzadas de RMN de bajo campo en el dominio del tiempo, ensayos de compresión y medidas de dureza. De forma adicional, se introdujeron residuos procedentes de reciclado físico y químico de otras industrias en las matrices de los poliuretanos, con el objetivo de alinear este trabajo con un modelo de Economía Circular y obtener un producto de alto valor añadido.
Nowadays, one of the major problems in the construction sector is the puncture of tires of civil engineering vehicles since it entails con- siderable economic losses. As a solution to this inconvenience, a particular type of elas- tomeric polyurethanes, and more specifically ultra-soft ones, is offered in the framework of the present work. The properties of the- se tire fillers were modulated from changes in the composition of flexible polyurethanes: catalyst, plasticizer distribution and excess isocyanate. The characterization of the new synthesized materials was carried out by means of ad- vanced low-field NMR techniques in the time domain, compression tests and hardness measurements. Additionally, residues from physical and chemical recycling from other industries were introduced into the polyu- rethane matrices, with the aim of aligning this work with a Circular Economy model and obtaining a high added value product.
Reciclado químico, RMN de bajo campo, plastificantes, Poliuretanos flexibles, Macizado de neumáticos.
Reciclado químico, RMN de bajo campo, plastificantes, Poliuretanos flexibles, Macizado de neumáticos.
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