{"id":55001,"date":"2006-11-10T00:00:00","date_gmt":"2006-11-10T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/migracion-de-plastificantes-de-pvc\/"},"modified":"2006-11-10T00:00:00","modified_gmt":"2006-11-10T00:00:00","slug":"migracion-de-plastificantes-de-pvc","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/analisis-de-polimeros\/migracion-de-plastificantes-de-pvc\/","title":{"rendered":"Migraci\u00f3n de plastificantes de pvc"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Silvia Mar\u00eda Garc\u00eda Garc\u00eda <\/strong><\/h2>\n<p>La migraci\u00f3n de plastificantes de pvc desde \u00e9ste hacia otros pol\u00edmeros en contacto acorta la vida \u00fatil y calidad del producto ya que se produce un empeoramiento de las propiedades de ambos pol\u00edmeros. En la actualidad, la normativa referente a la garant\u00eda de la calidad, la migraci\u00f3n de plastificantes de unos pl\u00e1sticos a otros ha tomado mayor importancia dentro de la industria del pl\u00e1stico. Este problema, la migraci\u00f3n del plastificante y la difusi\u00f3n s\u00f3lido-s\u00f3lido entre materiales pl\u00e1sticos, constituye el objeto principal del presente trabajo.En la presente investigaci\u00f3n se proponen dos m\u00e9todos diferentes para el estudio de la migraci\u00f3n: en el primero de los m\u00e9todos propuestos se determina la cantidad de plastificante migrado mediante an\u00e1lisis termogravim\u00e9trico y la aplicaci\u00f3n de un modelo cin\u00e9tico que permite separar los procesos observados y determinar porcentajes de migraci\u00f3n.El segundo m\u00e9todo utilizado es la espectroscop\u00eda atr-ftir mediante la cual se puede estudiar la evoluci\u00f3n de las bandas de absorci\u00f3n debidas al plastificante con el tiempo in situ, y de esta manera. La aplicaci\u00f3n de un modelo de difusi\u00f3n permite obtener los coeficientes de difusi\u00f3n del sistema. El tratamiento riguroso del problema permite calcular coeficientes de difusi\u00f3n individuales del plastificante en cada uno de los pol\u00edmeros del sistema a estudiar.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Migraci\u00f3n de plastificantes de pvc<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Migraci\u00f3n de plastificantes de pvc <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Silvia Mar\u00eda Garc\u00eda Garc\u00eda <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Alicante<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 11\/10\/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>Antonio Marcilla Gomis<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: julio Fernandez sempere <\/li>\n<li>ugarte Carmen mijangos (vocal)<\/li>\n<li>mart\u00ednez Joaqu\u00edn devesa (vocal)<\/li>\n<li>ega\u00f1a I\u00f1aki mondrag\u00f3n (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Silvia Mar\u00eda Garc\u00eda Garc\u00eda La migraci\u00f3n de plastificantes de pvc desde \u00e9ste hacia otros pol\u00edmeros en contacto [&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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