{"id":73975,"date":"2018-03-09T23:18:57","date_gmt":"2018-03-09T23:18:57","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/desarrollo-de-fibras-biconstituidas-de-polipropileno-y-poliamida-6-para-hilatura-de-alta-velocidad\/"},"modified":"2018-03-09T23:18:57","modified_gmt":"2018-03-09T23:18:57","slug":"desarrollo-de-fibras-biconstituidas-de-polipropileno-y-poliamida-6-para-hilatura-de-alta-velocidad","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/desarrollo-de-fibras-biconstituidas-de-polipropileno-y-poliamida-6-para-hilatura-de-alta-velocidad\/","title":{"rendered":"Desarrollo de fibras biconstituidas de polipropileno y poliamida 6 para hilatura de alta velocidad"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Sierra Mu\u00f1eton Juan  Diego <\/strong><\/h2>\n<p>En la presente investigaci\u00f3n se foruml\u00f3 un modelo matem\u00e1tico unidimensional que permite  simular la hilatura de fibras a partir de material fundido, partiendo de las ecuaciones b\u00e1sicas de fen\u00f3menos de transporte, a saber: ecuaci\u00f3n de continuidad, ecuaci\u00f3n de momento y ecuaci\u00f3n de energ\u00eda. Las anteriores ecuaciones deben complementarse con ecuaciones constitutivas y un modelo para la cin\u00e9tica de cristalizaci\u00f3n. Particularmente en esta investigaci\u00f3n se utilizaron dos modelos reol\u00f3gicos: uno newtoniano y otro viscoel\u00e1stico (phan thien y tanner de varios modos). En cuanto al modelo para describir  la cin\u00e9tica de cristalizaci\u00f3n se ilustra un modelo de nakamura, cuya constante de velocidad puede estimarse con las correlaciones propuestas por ziabicki y lauritzen y hoffman. Tambi\u00e9n se hace uso de algunas correlaciones para calcular:  el coeficiente de arrastre con el aire; el coeficiente de convecci\u00f3n de calor; la dependencia de la viscosidad con la temperatura y el grado de cristalizaci\u00f3n; y la tensi\u00f3n superficial. Para resolver el sistema de ecuaciones diferenciales acopladas que constituyen el modelo de la hilatura de fibras, se efectu\u00f3 una implementaci\u00f3n num\u00e9rica discretizando el sistema de ecuaciones en diferencias finitas y utilizando el m\u00e9todo del disparo y dos algoritmos de soluci\u00f3n, un m\u00e9todo de runge-kutta de orden 6 y un m\u00e9todo de crank-nicholson.  con el \u00e1nimo de efectuar una validaci\u00f3n del modelo implementado y para evaluar las propiedades y la morfolog\u00eda que se obtiene en las fibras biconstituidas fabricadas con mezclas de polipropileno y poliamida 6, se efectu\u00f3 una experimentaci\u00f3n en una l\u00ednea de hilatura de laboratorio y una extensa caracterizaci\u00f3n morfol\u00f3gica y mec\u00e1nica de las fibras. Una caracterizaci\u00f3n reol\u00f3gica de los pol\u00edmeros individuales y sus mezclas, permiti\u00f3 estimar los par\u00e1metros del modelo reol\u00f3gico para efectuar las simulaciones y tambi\u00e9n observar algunas anomal\u00edas interesan<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Desarrollo de fibras biconstituidas de polipropileno y poliamida 6 para hilatura de alta velocidad<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Desarrollo de fibras biconstituidas de polipropileno y poliamida 6 para hilatura de alta velocidad <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Sierra Mu\u00f1eton Juan  Diego <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 13\/05\/2005<\/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>Issa Antonio Katime Amashta<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 Mar\u00eda Teijon rivera <\/li>\n<li>victor Mosquera tallon (vocal)<\/li>\n<li>arturo Horta zubiaga (vocal)<\/li>\n<li>Jos\u00e9 Vazquez tato (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Sierra Mu\u00f1eton Juan Diego En la presente investigaci\u00f3n se foruml\u00f3 un modelo matem\u00e1tico unidimensional que permite simular [&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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[12909,13316,17,966],"tags":[7541,2865,13528,2863,160422,35051],"class_list":["post-73975","post","type-post","status-publish","format-standard","hentry","category-pais-vasco-euskal-herriko-unibertsitatea","category-polimeros-compuestos","category-quimica","category-quimica-macromolecular","tag-arturo-horta-zubiaga","tag-issa-antonio-katime-amashta","tag-jose-maria-teijon-rivera","tag-jose-vazquez-tato","tag-sierra-muneton-juan-diego","tag-victor-mosquera-tallon"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/73975","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=73975"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/73975\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=73975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=73975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=73975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}