{"id":56968,"date":"2007-09-02T00:00:00","date_gmt":"2007-09-02T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sintesis-y-caracterizacion-de-nanocompuestos-de-poliolefinas-e-hidroxidos-dobles-laminares\/"},"modified":"2007-09-02T00:00:00","modified_gmt":"2007-09-02T00:00:00","slug":"sintesis-y-caracterizacion-de-nanocompuestos-de-poliolefinas-e-hidroxidos-dobles-laminares","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/tecnologia-de-materiales\/sintesis-y-caracterizacion-de-nanocompuestos-de-poliolefinas-e-hidroxidos-dobles-laminares\/","title":{"rendered":"Sintesis y caracterizacion de nanocompuestos de poliolefinas e hidroxidos dobles laminares"},"content":{"rendered":"<h2>Tesis doctoral de <strong> M\u00f3nica Ardanuy Raso <\/strong><\/h2>\n<p>Con esta tesis se ha pretendido establecer las bases para la preparaci\u00f3n y caracterizaci\u00f3n de compuestos nanoestructurados formados por laminillas de espesor nanom\u00e9trico a partir de la exfoliaci\u00f3n de un hidr\u00f3xido doble laminar (ldh) organof\u00edlico y poliolefinas mediante proceso de mezclado en fundido. en una primera fase de la investigaci\u00f3n se estableci\u00f3 una metodolog\u00eda sencilla para preparar un ldh h\u00edbrido con aniones dodecilsulfato a partir de ldh precursor del tipo hidrotalcita. Para ello se probaron cuatro rutas: reconstituci\u00f3n en dos pasos y directa del ldh precursor calcinado con aniones dodecilsulfato e intercambio i\u00f3nico en dos pasos y directo de los carbonatos del ldh precursor por los aniones org\u00e1nicos. Las tres primeras rutas resultaron en la formaci\u00f3n de un h\u00edbrido, tal como se confirm\u00f3 por medidas de difracci\u00f3n de rayos x (drx) y espectroscopia infrarroja de transformada de fourier (ftir). La formaci\u00f3n de dicho h\u00edbrido provoc\u00f3 una expansi\u00f3n del espacio interlaminar, que pas\u00f3 de 7.7 \u00ed\u00a5 a unos 30 \u00ed\u00a5, conduciendo a una disminuci\u00f3n de la densidad. El mayor grado de intercambio result\u00f3 para la ruta de intercambio en dos pasos. La ruta de reconstituci\u00f3n en dos pasos permiti\u00f3 obtener un ldh h\u00edbrido libre de \u00f3xidos sin reconstituir, mientras que el h\u00edbrido obtenido por la ruta de reconstituci\u00f3n directa result\u00f3 con impurezas de dichos \u00f3xidos. Adem\u00e1s, el m\u00e9todo de reconstituci\u00f3n en dos pasos condujo a un h\u00edbrido con mayor estabilidad termooxidativa. en segundo lugar, se prepararon una serie de materiales compuestos, tanto con el ldh precursor como con el h\u00edbrido, y tres pol\u00edmeros de naturaleza olef\u00ednica: polipropileno, polietileno de alta densidad y un ion\u00f3mero de etileno y \u00e1cido metacr\u00edlico parcialmente neutralizado con sodio. Algunas de las formulaciones tambi\u00e9n se prepararon con compatibilizantes. En los materiales con polipropileno se utiliz\u00f3 copol\u00edmero de polipropileno con injertos de anh\u00eddrido mal\u00e9ico (pp-g-ma<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Sintesis y caracterizacion de nanocompuestos de poliolefinas e hidroxidos dobles laminares<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Sintesis y caracterizacion de nanocompuestos de poliolefinas e hidroxidos dobles laminares <\/li>\n<li><strong>Autor:<\/strong>\u00a0 M\u00f3nica Ardanuy Raso <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 09\/02\/2007<\/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>Jos\u00e9 Ignacio Velasco Perero<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Mart\u00ednez benasat <\/li>\n<li>Miguel \u00e1ngel Rodr\u00edguez p\u00e9rez (vocal)<\/li>\n<li>Jos\u00e9 Antonio De saja s\u00e1ez (vocal)<\/li>\n<li>Ana in\u00e9s Fern\u00e1ndez renna (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de M\u00f3nica Ardanuy Raso Con esta tesis se ha pretendido establecer las bases para la preparaci\u00f3n y caracterizaci\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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