{"id":1055,"date":"2024-02-04T14:08:49","date_gmt":"2024-02-04T06:08:49","guid":{"rendered":"https:\/\/www.joyforce.com\/?p=1055"},"modified":"2024-02-05T13:21:25","modified_gmt":"2024-02-05T05:21:25","slug":"characteristics-of-pva-1788","status":"publish","type":"post","link":"https:\/\/www.joyforce.com\/es\/blogs\/characteristics-of-pva-1788.html","title":{"rendered":"Caracter\u00edsticas del PVA 1788"},"content":{"rendered":"

Alcohol polivin\u00edlico PVA 1788 en hoja; inodoro, soluble en agua a 60-80\u00b0C. Su soluci\u00f3n acuosa tiene buenas propiedades adhesivas, film\u00f3genas y emulsionantes; es resistente a la mayor\u00eda de disolventes org\u00e1nicos como aceites, lubricantes e hidrocarburos; tiene propiedades qu\u00edmicas como la esterificaci\u00f3n, eterificaci\u00f3n y acetalizaci\u00f3n de polioles de cadena larga.<\/p>\n

    \n
  1. Propiedad de formaci\u00f3n de pel\u00edcula: El PVA 1788 es f\u00e1cil de formar una pel\u00edcula, y su pel\u00edcula tiene excelentes propiedades mec\u00e1nicas. La resistencia a la tracci\u00f3n de la pel\u00edcula aumenta con el incremento del grado de polimerizaci\u00f3n y el grado de alcoh\u00f3lisis.<\/li>\n<\/ol>\n
      \n
    1. Adherencia: El PVA 1788 tiene buena adherencia a la celulosa hidr\u00f3fila. En general, cuanto m\u00e1s alto es el grado de polimerizaci\u00f3n y alcoholisis, m\u00e1s fuerte es la fuerza de adhesi\u00f3n.<\/li>\n<\/ol>\n
        \n
      1. Estabilidad t\u00e9rmica: Cuando la hoja de PVA 1788 se calienta a unos 100 \u2103, su aspecto cambia gradualmente. El PVA parcialmente alcoholizado comienza a fundirse a unos 190\u00b0C y se descompone a 200\u00b0C. La alcoh\u00f3lisis completa del PVA comienza a fundirse a unos 230\u00b0C, y se descompone a 240\u00b0C. Los experimentos de craqueo t\u00e9rmico muestran que cuanto menor es el grado de polimerizaci\u00f3n, m\u00e1s r\u00e1pida es la p\u00e9rdida de peso; cuanto mayor es el grado de alcoholisis, menor es el tiempo de descomposici\u00f3n.<\/li>\n<\/ol>\n

        \"\"<\/p>","protected":false},"excerpt":{"rendered":"

        Alcohol polivin\u00edlico PVA 1788 en hoja; inodoro, soluble en agua a 60-80\u00b0C. Su soluci\u00f3n acuosa tiene buenas propiedades adhesivas, film\u00f3genas y emulsionantes; es resistente a la mayor\u00eda de disolventes org\u00e1nicos como aceites, lubricantes e hidrocarburos; tiene propiedades qu\u00edmicas como la esterificaci\u00f3n, eterificaci\u00f3n y acetalizaci\u00f3n de polioles de cadena larga. Propiedad formadora de pel\u00edcula: El PVA 1788 es f\u00e1cil de formar [...]<\/p>","protected":false},"author":1,"featured_media":1046,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-1055","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"acf":[],"yoast_head":"\nCharacteristics of PVA 1788 - JOYFORCE INDUSTRIAL<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.joyforce.com\/es\/blogs\/characteristics-of-pva-1788.html\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Characteristics of PVA 1788 - JOYFORCE INDUSTRIAL\" \/>\n<meta property=\"og:description\" content=\"Polyvinyl alcohol PVA 1788 sheet; odorless, soluble in water at 60-80\u00b0C. Its aqueous solution has good adhesion, film-forming and emulsifying properties; it is resistant to most organic solvents such as oils, lubricants and hydrocarbons; it has chemical properties such as esterification, etherification and acetalization of long-chain polyols. 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