{"id":15019,"date":"2025-03-10T09:22:44","date_gmt":"2025-03-10T09:22:44","guid":{"rendered":"https:\/\/www.epicmicron.com\/?p=15019"},"modified":"2025-03-25T00:18:16","modified_gmt":"2025-03-25T00:18:16","slug":"application-of-magnesium-hydroxide-in-rigid-polyvinyl-chloride-flame-retardant-sheets","status":"publish","type":"post","link":"https:\/\/www.epicmicron.com\/pt\/application-of-magnesium-hydroxide-in-rigid-polyvinyl-chloride-flame-retardant-sheets\/","title":{"rendered":"Aplica\u00e7\u00e3o de Hidr\u00f3xido de Magn\u00e9sio em Chapas R\u00edgidas de Policloreto de Vinila Retardantes de Chamas"},"content":{"rendered":"<p>Policloreto de vinila (PVC) \u00e9 um pl\u00e1stico termopl\u00e1stico de uso geral. Os fabricantes o usam amplamente em materiais de constru\u00e7\u00e3o devido \u00e0s suas excelentes propriedades mec\u00e2nicas, boa resist\u00eancia \u00e0 corros\u00e3o, propriedades antienvelhecimento e retardamento de chamas. Embora o PVC r\u00edgido tenha melhores propriedades retardantes de chamas do que os materiais de PVC macio devido \u00e0 pequena quantidade de <a href=\"https:\/\/en.wikipedia.org\/wiki\/Plasticizer\">plastificante<\/a> adicionado, ainda precisa de melhorias em termos de retardamento de chama e supress\u00e3o de fuma\u00e7a. Isso porque o PVC cont\u00e9m cloro, que pode facilmente produzir uma grande quantidade de gases \u00e1cidos prejudiciais durante a combust\u00e3o. Os altos pre\u00e7os da maioria dos retardantes de chama e seu complexo processo de prepara\u00e7\u00e3o dificultam a produ\u00e7\u00e3o em massa, ent\u00e3o muito poucos alcan\u00e7am a verdadeira industrializa\u00e7\u00e3o. Retardantes de chama inorg\u00e2nicos, como hidr\u00f3xido de magn\u00e9sio (MH), n\u00e3o apenas desempenham um papel de refor\u00e7o, mas tamb\u00e9m exibem boas propriedades de supress\u00e3o de fuma\u00e7a. O vapor de \u00e1gua e o \u00f3xido de magn\u00e9sio produzidos por sua decomposi\u00e7\u00e3o desempenham um papel de retardante de chama e supress\u00e3o de fuma\u00e7a na fase gasosa e na fase condensada, respectivamente.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"640\" height=\"427\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/Magnesium-Hydroxide-1.webp\" alt=\"\" class=\"wp-image-15024\" style=\"width:994px;height:auto\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/Magnesium-Hydroxide-1.webp 640w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/Magnesium-Hydroxide-1-300x200.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/Magnesium-Hydroxide-1-18x12.webp 18w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/Magnesium-Hydroxide-1-600x400.webp 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\"><em>Hidr\u00f3xido de Magn\u00e9sio<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Efeitos de um sistema retardador de chamas sin\u00e9rgico<\/h2>\n\n\n\n<p>Para estudar os efeitos de um sistema retardante de chamas sin\u00e9rgico composto por p\u00f3 de hidr\u00f3xido de magn\u00e9sio GY-3000, HX-3000, GY-6000 e tri\u00f3xido de antim\u00f4nio nas propriedades mec\u00e2nicas e retardantes de chamas de materiais r\u00edgidos de PVC, os pesquisadores desenvolveram a f\u00f3rmula mostrada na tabela a seguir.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td colspan=\"12\">                                                 Tabela de formula\u00e7\u00e3o do sistema retardante de chamas sin\u00e9rgico de tri\u00f3xido de antim\u00f4nio e \u00f3xido de zinco<\/td><\/tr><tr><td rowspan=\"2\">Componentes da formula\u00e7\u00e3o<\/td><td colspan=\"11\">C\u00f3digo de Formula\u00e7\u00e3o<\/td><\/tr><tr><td>0<\/td><td>1<\/td><td>2<\/td><td>3<\/td><td>4<\/td><td>5<\/td><td>6<\/td><td>7<\/td><td>8<\/td><td>9<\/td><td>10<\/td><\/tr><tr><td>PVC<\/td><td>100<\/td><td>100<\/td><td>100<\/td><td>100<\/td><td>100<\/td><td>100<\/td><td>100<\/td><td>100<\/td><td>100<\/td><td>100<\/td><td>100<\/td><\/tr><tr><td>P\u00f3 de zinco (GY-616)<\/td><td>50<\/td><td>50<\/td><td>50<\/td><td>50<\/td><td>50<\/td><td>50<\/td><td>50<\/td><td>50<\/td><td>50<\/td><td>50<\/td><td>50<\/td><\/tr><tr><td>\u00d3xido de Zinco GY-3000<\/td><td>\u2013<\/td><td>\u2013<\/td><td>4<\/td><td>8<\/td><td>12<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><td>\u00d3xido de Zinco HX-3000<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>4<\/td><td>8<\/td><td>12<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><td>\u00d3xido de Zinco GY-6000<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>4<\/td><td>8<\/td><td>12<\/td><\/tr><tr><td>Tri\u00f3xido de antim\u00f4nio<\/td><td>\u2013<\/td><td>5<\/td><td>4<\/td><td>3<\/td><td>2<\/td><td>4<\/td><td>3<\/td><td>2<\/td><td>4<\/td><td>3<\/td><td>2<\/td><\/tr><tr><td>Zinco-C\u00e1lcio<br>Estabilizador Composto<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><td>5.5<\/td><\/tr><tr><td>\u00c1cido Este\u00e1rico<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><td>0.6<\/td><\/tr><tr><td>Cera PE<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><td>0.8<\/td><\/tr><tr><td>CPE<\/td><td>6<\/td><td>6<\/td><td>6<\/td><td>6<\/td><td>6<\/td><td>6<\/td><td>6<\/td><td>6<\/td><td>6<\/td><td>6<\/td><td>6<\/td><\/tr><tr><td>Documento de trabalho<\/td><td>4<\/td><td>4<\/td><td>4<\/td><td>4<\/td><td>4<\/td><td>4<\/td><td>4<\/td><td>4<\/td><td>4<\/td><td>4<\/td><td>4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td colspan=\"6\">Par\u00e2metros f\u00edsicos b\u00e1sicos do \u00f3xido de zinco GY-3000, HX-3000, GY-6000<\/td><\/tr><tr><td>Marca<\/td><td>D50 (\u03bcm)<\/td><td>D97 (\u03bcm)<\/td><td>\u00c1rea de superf\u00edcie espec\u00edfica (m\u00b2\/g)<\/td><td>Brancura (\u00b0)<\/td><td>Valor de absor\u00e7\u00e3o de \u00f3leo (mL\/100g)<\/td><\/tr><tr><td>GY-3000<\/td><td>3.538<\/td><td>11.16<\/td><td>12.566<\/td><td>92<\/td><td>34<\/td><\/tr><tr><td>HX-3000<\/td><td>3.564<\/td><td>11.25<\/td><td>11.864<\/td><td>92<\/td><td>28<\/td><\/tr><tr><td>GY-6000<\/td><td>1.37<\/td><td>3.596<\/td><td>20.877<\/td><td>95<\/td><td>36<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Os pesquisadores misturam os materiais de acordo com as propor\u00e7\u00f5es na tabela de f\u00f3rmulas e os colocam no cilindro da extrusora. A extrusora ent\u00e3o processa a mistura em folhas finas de 5 mm a 180\u2103-195\u2103. Ent\u00e3o os pesquisadores as cortam em tamanhos correspondentes para amostras de \u00edndice de oxig\u00eanio (80 mm \u00d7 10 mm \u00d7 5 mm), densidade de fuma\u00e7a (25 mm \u00d7 25 mm \u00d7 3 mm), resist\u00eancia \u00e0 tra\u00e7\u00e3o (150 mm \u00d7 10 mm \u00d7 5 mm) e impacto (80 mm \u00d7 10 mm \u00d7 5 mm).<\/p>\n\n\n\n<p>Os pesquisadores medem o tamanho das part\u00edculas e a distribui\u00e7\u00e3o do p\u00f3 usando um analisador de tamanho de part\u00edculas a laser. Eles testam a \u00e1rea de superf\u00edcie espec\u00edfica usando um medidor de \u00e1rea de superf\u00edcie BET.<\/p>\n\n\n\n<p><strong>Brancura<\/strong>: Testado de acordo com a norma GB\/T 5950-2008.<br><strong>Absor\u00e7\u00e3o de \u00f3leo<\/strong>: Testado de acordo com a norma DB\/T 5211.15-2014.<\/p>\n\n\n\n<p>Os resultados dos testes experimentais s\u00e3o os seguintes:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>F\u00f3rmula<\/td><td>0<\/td><td>1<\/td><td>2<\/td><td>3<\/td><td>4<\/td><td>5<\/td><td>6<\/td><td>7<\/td><td>8<\/td><td>9<\/td><td>10<\/td><\/tr><tr><td>Resist\u00eancia \u00e0 Tra\u00e7\u00e3o (Mpa)<\/td><td>27.35&nbsp;<\/td><td>28.28&nbsp;<\/td><td>24.71&nbsp;<\/td><td>18.84&nbsp;<\/td><td>25.33&nbsp;<\/td><td>27.88&nbsp;<\/td><td>26.95&nbsp;<\/td><td>27.10&nbsp;<\/td><td>26.02&nbsp;<\/td><td>28.21&nbsp;<\/td><td>28.93&nbsp;<\/td><\/tr><tr><td>Resist\u00eancia ao Impacto (Mpa)<\/td><td>3.27&nbsp;<\/td><td>4.55&nbsp;<\/td><td>4.00&nbsp;<\/td><td>3.20&nbsp;<\/td><td>2.81&nbsp;<\/td><td>3.99&nbsp;<\/td><td>3.90&nbsp;<\/td><td>4.13&nbsp;<\/td><td>3.18&nbsp;<\/td><td>4.18&nbsp;<\/td><td>5.43&nbsp;<\/td><\/tr><tr><td>\u00cdndice de oxig\u00eanio LOI (%)<\/td><td>36.80&nbsp;<\/td><td>43.80&nbsp;<\/td><td>46.80&nbsp;<\/td><td>47.60&nbsp;<\/td><td>46.60&nbsp;<\/td><td>46.20&nbsp;<\/td><td>46.40&nbsp;<\/td><td>45.60&nbsp;<\/td><td>45.80&nbsp;<\/td><td>46.80&nbsp;<\/td><td>47.00&nbsp;<\/td><\/tr><tr><td>Densidade M\u00e1xima de Fuma\u00e7a (%)<\/td><td>93.61&nbsp;<\/td><td>84.98&nbsp;<\/td><td>82.45&nbsp;<\/td><td>75.75&nbsp;<\/td><td>72.48&nbsp;<\/td><td>80.69&nbsp;<\/td><td>84.29&nbsp;<\/td><td>75.48&nbsp;<\/td><td>84.14&nbsp;<\/td><td>89.23&nbsp;<\/td><td>74.64&nbsp;<\/td><\/tr><tr><td>N\u00edvel de densidade de fuma\u00e7a<\/td><td>68.25&nbsp;<\/td><td>64.75&nbsp;<\/td><td>63.52&nbsp;<\/td><td>61.97&nbsp;<\/td><td>55.31&nbsp;<\/td><td>62.78&nbsp;<\/td><td>65.48&nbsp;<\/td><td>61.92&nbsp;<\/td><td>67.24&nbsp;<\/td><td>64.41&nbsp;<\/td><td>61.74&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>\u00cdndice de oxig\u00eanio<\/strong>: Testado de acordo com a norma GB\/T 2406.2-2009.<br><strong>Densidade da fuma\u00e7a<\/strong>: Testado de acordo com a norma GB\/T 8627-2007.<br><strong>Propriedades mec\u00e2nicas<\/strong>: Os testes de propriedades de tra\u00e7\u00e3o do pl\u00e1stico e de resist\u00eancia ao impacto da viga em balan\u00e7o foram realizados de acordo com as normas GB\/T 1040.1-2006 e GB\/T 1843-2008.<\/p>\n\n\n\n<p>Conforme visto na tabela, a resist\u00eancia \u00e0 tra\u00e7\u00e3o sem qualquer retardante de chama \u00e9 de 27,3 MPa, e a resist\u00eancia \u00e0 tra\u00e7\u00e3o do PVC com Sb\u2082O\u2083 adicionado sozinho \u00e9 ligeiramente melhorada para 28,3 MPa. Adicionar MH ao GY-3000 resulta em uma ligeira diminui\u00e7\u00e3o na resist\u00eancia \u00e0 tra\u00e7\u00e3o do produto. A resist\u00eancia \u00e0 tra\u00e7\u00e3o do HX-3000 n\u00e3o diminui, e a resist\u00eancia \u00e0 tra\u00e7\u00e3o da f\u00f3rmula n\u00ba 5 (que substitui 1 parte de Sb\u2082O\u2083 por 4 partes de MH) \u00e9 de 27,8 MPa. Isso indica que a compatibilidade do HX-3000 com o PVC \u00e9 melhorada ap\u00f3s o tratamento de superf\u00edcie, aumentando assim as propriedades mec\u00e2nicas. <\/p>\n\n\n\n<p>Quando 4 partes de GY-6000 s\u00e3o adicionadas ao material composto de MH, a resist\u00eancia \u00e0 tra\u00e7\u00e3o diminui, mas conforme a quantidade de MH adicionada aumenta, a resist\u00eancia \u00e0 tra\u00e7\u00e3o aumenta gradualmente, atingindo um m\u00e1ximo de 28,9 MPa. Isso \u00e9 significativamente maior do que em outras f\u00f3rmulas, sugerindo que o tamanho menor de part\u00edcula de MH aumenta sua \u00e1rea de contato com PVC, levando a um desempenho de tra\u00e7\u00e3o aprimorado.<\/p>\n\n\n\n<p>Como visto na tabela, a resist\u00eancia ao impacto sem qualquer retardante de chama \u00e9 de 3,27 MPa, e a resist\u00eancia ao impacto do PVC com Sb\u2082O\u2083 adicionado sozinho torna-se significativamente 4,55 MPa. Adicionar 4 partes de GY-3000 ao material composto MH aumenta muito a resist\u00eancia ao impacto para 4 MPa. No entanto, \u00e0 medida que o conte\u00fado continua a aumentar, a resist\u00eancia ao impacto do material composto diminui. A resist\u00eancia ao impacto do HX-3000 ativo \u00e9 significativamente aumentada, atingindo 4,13 MPa, mostrando que o tratamento de superf\u00edcie melhora efetivamente as propriedades mec\u00e2nicas. A resist\u00eancia ao impacto do material composto GY-6000 MH mostra o maior aumento. Com mais MH adicionado, a resist\u00eancia ao impacto aumenta rapidamente, atingindo um m\u00e1ximo de 5,42 MPa, o que \u00e9 significativamente maior do que outras f\u00f3rmulas. Isso sugere que o tamanho de part\u00edcula mais fino leva a um efeito de endurecimento de microesferas aprimorado, melhorando muito a resist\u00eancia ao impacto.<\/p>\n\n\n\n<p>Os dados do \u00edndice de oxig\u00eanio na tabela mostram que adicionar hidr\u00f3xido de magn\u00e9sio melhora significativamente o \u00edndice de oxig\u00eanio do material composto de PVC. Adicionar 8 partes de GY-3000 aumenta o \u00edndice de oxig\u00eanio para um m\u00e1ximo de 47,6%. O \u00edndice de oxig\u00eanio do HX-3000 foi ligeiramente menor. Isso pode ser devido ao efeito do surfactante na superf\u00edcie externa, mas ainda \u00e9 maior do que o PVC sem qualquer retardante de chama. Adicionar mais GY-6000, o \u00edndice de oxig\u00eanio aumenta, atingindo um m\u00e1ximo de 47%.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/jet-mill-0328.webp\" alt=\"\" class=\"wp-image-15021\" style=\"width:724px;height:auto\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/jet-mill-0328.webp 1000w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/jet-mill-0328-300x300.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/jet-mill-0328-100x100.webp 100w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/jet-mill-0328-768x768.webp 768w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/jet-mill-0328-12x12.webp 12w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/03\/jet-mill-0328-600x600.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>Os dados de supress\u00e3o de fuma\u00e7a mostram que a adi\u00e7\u00e3o de retardantes de chama reduz significativamente o n\u00edvel de densidade de fuma\u00e7a do material composto de PVC. Usar Sb\u2082O\u2083 sozinho reduz a densidade m\u00e1xima de fuma\u00e7a para 85%, enquanto o GY-3000 fornece o melhor efeito de supress\u00e3o de fuma\u00e7a. \u00c0 medida que a quantidade de GY-3000 aumenta, seu efeito de supress\u00e3o de fuma\u00e7a continua a melhorar, reduzindo a densidade m\u00ednima de fuma\u00e7a para 72,5%. Os efeitos de supress\u00e3o de fuma\u00e7a do HX-3000 e do GY-6000 s\u00e3o ligeiramente inferiores aos do GY-3000, com os valores m\u00ednimos de densidade m\u00e1xima de fuma\u00e7a sendo 75,48% e 74,64%, respectivamente.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclus\u00e3o<\/strong><\/h2>\n\n\n\n<p>Ao estudar as propriedades retardantes de chama, supress\u00e3o de fuma\u00e7a e mec\u00e2nicas de materiais comp\u00f3sitos de hidr\u00f3xido de magn\u00e9sio com diferentes tipos e componentes, as conclus\u00f5es s\u00e3o as seguintes:<\/p>\n\n\n\n<p>O \u00edndice de oxig\u00eanio de materiais compostos de PVC com a adi\u00e7\u00e3o de hidr\u00f3xido de magn\u00e9sio \u00e9 significativamente melhorado. Quando adicionadas 8 partes de GY-3000, o \u00edndice de oxig\u00eanio atinge um m\u00e1ximo de 47,6%. Quanto mais GY-6000 adicionado, maior o \u00edndice de oxig\u00eanio, com o \u00edndice m\u00e1ximo de oxig\u00eanio atingindo 47%.<\/p>\n\n\n\n<p>O GY-3000 tem o melhor efeito de supress\u00e3o de fuma\u00e7a. Conforme a quantidade de GY-3000 adicionada aumenta, o efeito de supress\u00e3o de fuma\u00e7a continua a melhorar, com a densidade m\u00ednima de fuma\u00e7a caindo para 72,5%. Os efeitos de supress\u00e3o de fuma\u00e7a do HX-3000 e do GY-6000 s\u00e3o ligeiramente menores do que os do GY-3000, com densidades m\u00ednimas m\u00e1ximas de fuma\u00e7a de 75,5% e 74,6%, respectivamente.<\/p>\n\n\n\n<p>A resist\u00eancia \u00e0 tra\u00e7\u00e3o e a resist\u00eancia ao impacto do material comp\u00f3sito com 12 partes de GY-6000 MH adicionadas s\u00e3o as mais altas, atingindo 28,9 MPa e 5,4 MPa, respectivamente.<\/p>\n\n\n\n<p>Contact us today for a free consultation and customized solutions!&nbsp;Our expert team is dedicated to providing high-quality products and services to maximize the value of your powder processing.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.epicmicron.com\/pt\">P\u00f3 \u00e9pico<\/a>\u2014Seu especialista confi\u00e1vel em processamento de p\u00f3!<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Moinho de jato Airf no local de um cliente de Xangai, SS304, MQW06\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/khXSttTeGBo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Policloreto de vinila (PVC) \u00e9 um pl\u00e1stico termopl\u00e1stico de uso geral. Os fabricantes o usam amplamente em materiais de constru\u00e7\u00e3o devido \u00e0s suas excelentes propriedades mec\u00e2nicas, boa resist\u00eancia \u00e0 corros\u00e3o, propriedades antienvelhecimento e retardamento de chamas. 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