{"id":652,"date":"2024-02-04T12:16:32","date_gmt":"2024-02-04T04:16:32","guid":{"rendered":"https:\/\/www.joyforce.com\/?p=652"},"modified":"2024-02-05T13:52:00","modified_gmt":"2024-02-05T05:52:00","slug":"basic-characteristics-of-polyvinyl-alcohol","status":"publish","type":"post","link":"https:\/\/www.joyforce.com\/pt\/blogs\/basic-characteristics-of-polyvinyl-alcohol.html","title":{"rendered":"Caracter\u00edsticas b\u00e1sicas do \u00e1lcool polivin\u00edlico"},"content":{"rendered":"

Caracter\u00edsticas b\u00e1sicas de\u00a0\u00e1lcool polivin\u00edlico<\/a><\/p>\n

(1) Viscosidade: Sua viscosidade varia de acordo com a variedade, a concentra\u00e7\u00e3o e a temperatura. \u00c0 medida que a concentra\u00e7\u00e3o aumenta, o valor da viscosidade aumenta acentuadamente; \u00e0 medida que a temperatura aumenta, a viscosidade diminui significativamente.<\/p>\n

(2) Ades\u00e3o:\u00a0\u00c1lcool polivin\u00edlico<\/a>\u00a0tem forte ades\u00e3o a materiais de superf\u00edcie porosa hidrof\u00edlica, como papel, t\u00eaxteis, madeira, concreto, argamassa e superf\u00edcies lisas e n\u00e3o absorventes.<\/p>\n

(3) Propriedades de forma\u00e7\u00e3o de filme: Ele pode formar um filme mais flex\u00edvel, e a resist\u00eancia mec\u00e2nica de\u00a0\u00e1lcool polivin\u00edlico<\/a>\u00a0pode ser ajustado por plastificantes.<\/p>\n

(4) Impermeabilidade ao g\u00e1s: Ap\u00f3s\u00e1lcool polivin\u00edlico<\/a>\u00a0\u00e9 formado em um filme, ele \u00e9 altamente imperme\u00e1vel a muitos gases, especialmente oxig\u00eanio, di\u00f3xido de carbono, hidrog\u00eanio, h\u00e9lio, sulfeto de hidrog\u00eanio e assim por diante. Mas para o cloro e o vapor de \u00e1gua, a permeabilidade do g\u00e1s \u00e9 alta, e o g\u00e1s tem uma alta taxa de passagem para o \u00e1lcool polivin\u00edlico.<\/p>\n

(5) Resist\u00eancia qu\u00edmica: Possui alta resist\u00eancia \u00e0 corros\u00e3o por hidr\u00f3xido de c\u00e1lcio, \u00e1cido ac\u00e9tico, a maioria dos \u00e1cidos inorg\u00e2nicos, nitrato de s\u00f3dio, cloreto de alum\u00ednio, cloreto de c\u00e1lcio, carbonato de c\u00e1lcio, sulfato de s\u00f3dio e sulfato de pot\u00e1ssio.<\/p>\n

(6) Solubilidade em \u00e1gua: A solubilidade de\u00a0\u00e1lcool polivin\u00edlico<\/a>\u00a0est\u00e1 intimamente relacionado ao grau de alco\u00f3lise do produto. Os produtos com um grau de alco\u00f3lise de 87% a 89% t\u00eam boa solubilidade em \u00e1gua, como\u00a0\u00e1lcool polivin\u00edlico<\/a>\u00a0PVA24-88, que tem um grau de alco\u00f3lise de 88%, e pode ser bem dissolvido em \u00e1gua fria ou quente. Na produ\u00e7\u00e3o real, o uso de \u00e1gua quente pode acelerar a taxa de dissolu\u00e7\u00e3o. Os produtos com um grau de alco\u00f3lise acima de 90% s\u00f3 podem ser dissolvidos em \u00e1gua quente a 95\u00b0C.<\/p>\n

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

Caracter\u00edsticas b\u00e1sicas do \u00e1lcool polivin\u00edlico (1) Viscosidade: Sua viscosidade varia de acordo com a variedade, a concentra\u00e7\u00e3o e a temperatura. \u00c0 medida que a concentra\u00e7\u00e3o aumenta, o valor da viscosidade aumenta acentuadamente; \u00e0 medida que a temperatura aumenta, a viscosidade diminui significativamente. (2) Ades\u00e3o: O \u00e1lcool polivin\u00edlico tem forte ades\u00e3o a materiais de superf\u00edcie porosa hidrof\u00edlica, como papel, t\u00eaxteis, madeira, concreto, argamassa e superf\u00edcies lisas e n\u00e3o absorventes. (3) Forma\u00e7\u00e3o de filme [...]<\/p>","protected":false},"author":1,"featured_media":656,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-652","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"acf":[],"yoast_head":"\nBasic Characteristics of Polyvinyl Alcohol - 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\/pt\/blogs\/basic-characteristics-of-polyvinyl-alcohol.html\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Basic Characteristics of Polyvinyl Alcohol - JOYFORCE INDUSTRIAL\" \/>\n<meta property=\"og:description\" content=\"Basic characteristics of\u00a0polyvinyl alcohol (1) Viscosity: Its viscosity varies with variety, concentration and temperature. As the concentration increases, the viscosity value rises sharply; as the temperature increases, the viscosity decreases significantly. (2) Adhesion:\u00a0Polyvinyl alcohol\u00a0has strong adhesion to hydrophilic porous surface materials, such as paper, textiles, wood, concrete, mortar and smooth and non-absorbent surfaces. 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