{"id":39614,"date":"1999-01-01T00:00:00","date_gmt":"1999-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/dinamica-molecular-y-desarrollo-microestructural-en-vidrios-polimericos-cristalizacion-en-tiempo-real\/"},"modified":"1999-01-01T00:00:00","modified_gmt":"1999-01-01T00:00:00","slug":"dinamica-molecular-y-desarrollo-microestructural-en-vidrios-polimericos-cristalizacion-en-tiempo-real","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/dinamica-molecular-y-desarrollo-microestructural-en-vidrios-polimericos-cristalizacion-en-tiempo-real\/","title":{"rendered":"Dinamica molecular y desarrollo microestructural en vidrios polimericos: cristalizacion en tiempo real."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Aurora Nogales Ruiz <\/strong><\/h2>\n<p>En este trabajo se ha estudiado la influencia de la microestructura en las propiedades din\u00e1micas de vidrios polim\u00e9ricos. En particular se ha seguido en tiempo real, la evoluci\u00f3n de la relajaci\u00f3n \u00abalfa\u00bb que aparece en estos materiales a temperaturas por encima de la transici\u00f3n v\u00edtrea cuando se desarrolla un proceso de cristalizaci\u00f3n en los pol\u00edmeros: poli(hidroxibutirato) (phb), poli(etileno 2,6-naftaleno dicarboxilato) (pen) y poli(aril \u00e9ter \u00e9ter cetona) (peek). Se utilizaron t\u00e9cnicas de espectroscop\u00eda diel\u00e9ctrica y espectroscop\u00eda de dispersi\u00f3n de neutrones para el estudio de la din\u00e1mica y dispersi\u00f3n de rayos x tanto a \u00e1ngulos altos como bajos mediante radiaci\u00f3n sincrotr\u00f3n para el estudio de la evoluci\u00f3n de la microestructura. Los cambios en los par\u00e1metros diel\u00e9ctricos pueden ser descritos en t\u00e9rminos de la ecuaci\u00f3n fenomenol\u00f3gica de havriliak-negami. El esfuerzo diel\u00e9ctrico, sigue una forma sigmoidal similar a la de la cristalinidad. Se observa una reducci\u00f3n de la movilidad de las cadenas en la fase amorfa, cuando el tiempo de cristalizaci\u00f3n avanza. esta ralentizaci\u00f3n depende de la cantidad de fase cristalina presente en la muestra. Se ha evaluado tambi\u00e9n la influencia de la rigidez molecular en las restricciones impuestas por la cristalinidad a las cadenas amorfas.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Dinamica molecular y desarrollo microestructural en vidrios polimericos: cristalizacion en tiempo real.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Dinamica molecular y desarrollo microestructural en vidrios polimericos: cristalizacion en tiempo real. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Aurora Nogales Ruiz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1999<\/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>Tiberio Antonio Ezquerra Sanz<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan  manuel Rojo  alaminos <\/li>\n<li>Manuel Laso (vocal)<\/li>\n<li>Marta Alvarez (vocal)<\/li>\n<li> Martinez duart Jos\u00e9 Manuel (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Aurora Nogales Ruiz En este trabajo se ha estudiado la influencia de la microestructura en las propiedades [&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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