{"id":78220,"date":"2018-03-09T23:23:50","date_gmt":"2018-03-09T23:23:50","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/mecanismos-y-aplicaciones-de-la-ablacion-laser-de-pola%c2%admeros-dopados\/"},"modified":"2018-03-09T23:23:50","modified_gmt":"2018-03-09T23:23:50","slug":"mecanismos-y-aplicaciones-de-la-ablacion-laser-de-pola%c2%admeros-dopados","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/mecanismos-y-aplicaciones-de-la-ablacion-laser-de-pola%c2%admeros-dopados\/","title":{"rendered":"Mecanismos y aplicaciones de la ablaci\u00f3n l\u00e1ser de pol\u00edmeros dopados"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Esther Rebollar Gonz\u00e1lez <\/strong><\/h2>\n<p>La influencia del peso molecular (pm) en los mecanismos que operan en la ablaci\u00f3n l\u00e1ser de pol\u00edmeros ha sido escasamente considerada a pesar de que este par\u00e1metro determina muchas de las propiedades de estos substratos tales como las temperaturas de transici\u00f3n, la viscosidad o las propiedades mec\u00e1nicas.  en este trabajo se presentan los resultados de un estudio destinado a elucidar el efecto del tama\u00f1o de la cadena polim\u00e9rica en la ablaci\u00f3n con l\u00e1ser de exc\u00edmero a 248 nm de dos pol\u00edmeros, polimetilmetacrilato, pmma (1.9, 2.5, 120 and 996 kda) y poliestireno, ps (15.1, 280 y 532 kda) dopados con los compuestos de fotoqu\u00edmica bien conocida yodonaftaleno(napl) y yodofenantreno (phenl). Con este fin se examinaron los procesos inducidos en el substrato tras la ablaci\u00f3n y las propiedades de la pluma de ablaci\u00f3n de pel\u00edculas de los mencionados pol\u00edmeros dopados utilizando un conjunto de t\u00e9cnicas espectrosc\u00f3pias y anal\u00edticas. Para el seguimiento de los procesos inducidos en las pel\u00edculas tras la ablaci\u00f3n se utiliz\u00f3 un esquema de bombeo y prueba en el que se detecta la formaci\u00f3n de fotoproductos mediante fluorescencia inducida por l\u00e1ser (fil). Las modificaciones qu\u00edmicas inducidas en el substrato se estudiaron asimismo mediante espectroscop\u00eda micro-raman. Los cambios morfol\u00f3gicos inducidos por irradiaci\u00f3n l\u00e1ser se examinaron mediante microscop\u00eda \u00f3ptica. Para investigar la escala de tiempos en la que ocurren estos cambios, se midi\u00f3 en tiempo real la transmisi\u00f3n por el substrato y por la pluma de ablaci\u00f3n de un l\u00e1ser de prueba continuo de hene. La distribuci\u00f3n translacional de los productos arh en la pluma de ablaci\u00f3n se midi\u00f3 en vac\u00edo mediante fil empleando el cuarto arm\u00f3nico de un l\u00e1ser de nd:yag como l\u00e1ser de prueba. Los resultados obtenidos ilustran el profundo efecto del pm y del coeficiente de absorci\u00f3n del pol\u00edmero sobre el proceso de ablaci\u00f3n. En el pol\u00edmero de mayor pm se obtiene mayor rendimiento y velocidad de formaci<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Mecanismos y aplicaciones de la ablaci\u00f3n l\u00e1ser de pol\u00edmeros dopados<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Mecanismos y aplicaciones de la ablaci\u00f3n l\u00e1ser de pol\u00edmeros dopados <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Esther Rebollar Gonz\u00e1lez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 13\/01\/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>Marta Castillejo Striano<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Verdasco costales Juan  enrique <\/li>\n<li>margarita Martin mu\u00f1oz (vocal)<\/li>\n<li>savas Gedrgiou (vocal)<\/li>\n<li>concepci\u00f3n Domingo maroto (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Esther Rebollar Gonz\u00e1lez La influencia del peso molecular (pm) en los mecanismos que operan en la ablaci\u00f3n [&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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