{"id":53279,"date":"2018-03-09T22:40:57","date_gmt":"2018-03-09T22:40:57","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/contribution-to-the-relaxation-study-in-polymers-by-dielectric-spectroscopy-and-thermal-stimulated-currents\/"},"modified":"2018-03-09T22:40:57","modified_gmt":"2018-03-09T22:40:57","slug":"contribution-to-the-relaxation-study-in-polymers-by-dielectric-spectroscopy-and-thermal-stimulated-currents","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/contribution-to-the-relaxation-study-in-polymers-by-dielectric-spectroscopy-and-thermal-stimulated-currents\/","title":{"rendered":"Contribution to the relaxation study in polymers by dielectric spectroscopy and thermal stimulated currents"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Dom\u00ednguez Espinosa Gustavo Noel <\/strong><\/h2>\n<p>Se ha estudiado la influencia de la estructura qu\u00edmica de los pol\u00edmeros en su comportamiento relajacional. Las t\u00e9cnicas experimentales fueron la espectroscopia diel\u00e9ctrica de banda ancha y corrientes de despolarizaci\u00f3n t\u00e9rmicamente estimuladas. Se ha estudiado por un lado las relajaciones por debajo de la temperatura de transici\u00f3n v\u00edtrea y, por otra parte, la evoluci\u00f3n de los procesos por encima de la transici\u00f3n v\u00edtrea.  para el estudio de las relajaciones sub-v\u00edtreas la t\u00e9cnica de corrientes de despolarizaci\u00f3n t\u00e9rmicamente estimuladas fue utilizada como herramienta fundamental en el estudio de los procesos relajacionales. Esta t\u00e9cnica se ha complementado con medidas realizadas mediante espectroscopia de impedancias y con c\u00e1lculos te\u00f3ricos de mec\u00e1nica molecular. En el cap\u00edtulo 2 se realiza un estudio con metacrilatos de metil-ciclohexilo, variando la posici\u00f3n de grupo metilo en el anillo.En el cap\u00edtulo 3 se presenta el estudio de una serie de pol\u00edmeros itac\u00f3nicos di sustituidos en el grupo ester por metilos, etilos, propilos y ciclo-hexilos.  en el cap\u00edtulo 4, se presenta un estudio de los procesos relajacionales por encima de la transici\u00f3n v\u00edtrea. La t\u00e9cnica experimental principal ha sido la espectroscopia diel\u00e9ctrica de banda ancha, y como t\u00e9cnica de apoyo se ha utilizado las corrientes de despolarizaci\u00f3n t\u00e9rmicamente estimuladas. para una mayor separaci\u00f3n de los procesos se ha utilizado una herramienta matem\u00e1tica para la inversi\u00f3n de los datos de permitividad diel\u00e9ctrica a distribuci\u00f3n de tiempos de retardo. El principal objeto de este cap\u00edtulo es observar como los procesos se superponen a altas temperaturas y la influencia que la estructura qu\u00edmica de los pol\u00edmeros tiene sobre dicha superposici\u00f3n.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Contribution to the relaxation study in polymers by dielectric spectroscopy and thermal stimulated currents<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Contribution to the relaxation study in polymers by dielectric spectroscopy and thermal stimulated currents <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Dom\u00ednguez Espinosa Gustavo Noel <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 20\/06\/2006<\/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>Ricardo D\u00edaz Calleja<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: evaristo Riande Garc\u00eda <\/li>\n<li>jan Van turnhout (vocal)<\/li>\n<li>Juan Belana punseti (vocal)<\/li>\n<li>enrique S\u00e1nchez mart\u00ednez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Dom\u00ednguez Espinosa Gustavo Noel Se ha estudiado la influencia de la estructura qu\u00edmica de los pol\u00edmeros en [&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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