{"id":111473,"date":"2018-03-11T10:38:01","date_gmt":"2018-03-11T10:38:01","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/analytical-study-of-accelerated-light-ageing-and-cleaning-effects-on-acrylic-and-pvac-dispersion-paints-used-in-modern-and-contemporary-art\/"},"modified":"2018-03-11T10:38:01","modified_gmt":"2018-03-11T10:38:01","slug":"analytical-study-of-accelerated-light-ageing-and-cleaning-effects-on-acrylic-and-pvac-dispersion-paints-used-in-modern-and-contemporary-art","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/pintura\/analytical-study-of-accelerated-light-ageing-and-cleaning-effects-on-acrylic-and-pvac-dispersion-paints-used-in-modern-and-contemporary-art\/","title":{"rendered":"Analytical study of accelerated light ageing and cleaning effects on acrylic and pvac dispersi\u00f3n paints used in modern and contemporary art"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Miguel De Sousa Ramos F\u00e9lix Silva <\/strong><\/h2>\n<p>In this study, analytical techniques were used for the characterization of acrylic and poly(vinyl acetate) (pvac) products before and after accelerated aging and wet cleaning treatments. for this purpose, analytical techniques such as fourier transformed infrared spectroscopy-attenuated total reflection (ftir-atr) and in-situ thermally assisted pyrolysis-silylation-gas chromatography-mass spectrometry (py-silylation-gc-ms) were used for chemical characterization. Scanning electron microscope with energy dispersion x-ray fluorescence analysis (sem-edx) and tensile tests were run for morphological and mechanical characterization.  for studying the degradation processes caused by light exposure, a set of acrylic and pvac products were subjected to two accelerated aging protocols. In order to represent normal aging conditions these were conducted at environmental temperature (t) and relative humidity (rh) conditions. Consistent information on the aging of these products has been obtained by contrasting the resulting chemical and mechanical data from both aging programs. Specific degradation pathways such as chain-scissions or cross-linking were detected in this way. In general, acrylics were fairly more stable to artificial aging than pvac and styrene-acrylics. finally, the effects of wet cleaning treatments were evaluated, with special focus on the action of water. Other cleaning treatments, comprising gels and emulsions were tested as well. The results indicate that water can cause changes in the morphology and mechanical properties of the samples as well as leaching of additives. These effects were significantly reduced when water was used in a gelled form. Ftir-atr and py-silylation-gc-ms were used to study the additives extracted from the samples after cleaning treatments. Octyphenol and fatty alcohols non-ionic surfactants with poly(ethoxylated) chains have been detected, as well as anionic sulphonate type surfactants. Cellulose ether, poly(vinyl alcohol) and polyacrylic based thickeners were detected in the solid extracts from different test specimens.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Analytical study of accelerated light ageing and cleaning effects on acrylic and pvac dispersi\u00f3n paints used in modern and contemporary art<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Analytical study of accelerated light ageing and cleaning effects on acrylic and pvac dispersi\u00f3n paints used in modern and contemporary art <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Miguel De Sousa Ramos F\u00e9lix Silva <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 20\/10\/2011<\/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>Mar\u00eda Teresa Domenech Carbo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: M\u00aa victoria Vivancos ram\u00f3n <\/li>\n<li>Jos\u00e9 Miguel Martin Martinez (vocal)<\/li>\n<li>oscar Chiantore (vocal)<\/li>\n<li>Jos\u00e9 vicente Gimeno adelantado (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Miguel De Sousa Ramos F\u00e9lix Silva In this study, analytical techniques were used for the characterization of [&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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