{"id":130780,"date":"1996-01-01T00:00:00","date_gmt":"1996-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/poliuretanos-de-base-fenolica\/"},"modified":"1996-01-01T00:00:00","modified_gmt":"1996-01-01T00:00:00","slug":"poliuretanos-de-base-fenolica","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/poliuretanos-de-base-fenolica\/","title":{"rendered":"Poliuretanos de base fenolica."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Lourdes Muguerza Azurmendi <\/strong><\/h2>\n<p>El presente trabajo constituye una primera aproximacion de corte cientifico a un tipo de materiales polimericos empleados como aglomerantes de arena en el mundo de la fundicion. Dichos materiales, poliuretanos obtenidos \u00abin situ\u00bb mediante la reaccion de un isocianato y una resina fenolica, han sido objeto de pocos trabajos sistematicos sobre los diversos aspectos que pudieran tener repercusiones importantes en su comportamiento final.  sobre esa base se ha realizado un estudio que comprende la caracterizacion de las resinas fenolicas de partida y del poliuretano final mediante tecnicas espectroscopicas.  asi mismo, se ha realizado un estudio cinetico de la reaccion de formacion de poliuretano en ausencia de catalizador, lo que tiene indudable interes en el manejo de la mezcla reactiva antes de su reticulacion instantanea por la presencia de un catalizador. Se han investigado de forma sistematica las condiciones idoneas para la obtencion de piezas aglomeradas de optimas propiedades mecanicas y, finalmente, se han realizado unos primeros intentos de incorporar peque\u00f1as adiciones de ciertos termoplasticos como forma de regular las anteriormente citadas propiedades mecanicas finales.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Poliuretanos de base fenolica.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Poliuretanos de base fenolica. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Lourdes Muguerza Azurmendi <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1996<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Juan  Jos\u00e9 Iruin Sanz<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Asua Gonzalez Jos\u00e9 Mar\u00eda <\/li>\n<li>Antx\u00f3n Mart\u00ednez De Ilarduya S\u00e1ez De Asteasu (vocal)<\/li>\n<li>Salvador Monserrat Ribas (vocal)<\/li>\n<li> Arroyo Ramos Victor Miguel (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Lourdes Muguerza Azurmendi El presente trabajo constituye una primera aproximacion de corte cientifico a un tipo de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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