{"id":2103,"date":"2025-06-18T18:41:20","date_gmt":"2025-06-19T01:41:20","guid":{"rendered":"https:\/\/fshualinkeji.com\/?p=2103"},"modified":"2025-06-18T20:12:33","modified_gmt":"2025-06-19T03:12:33","slug":"polipropileno-modificado","status":"publish","type":"post","link":"https:\/\/fshualinkeji.com\/pt\/polipropileno-modificado\/","title":{"rendered":"Explore o polipropileno modificado: Composi\u00e7\u00e3o, propriedades e aplica\u00e7\u00f5es"},"content":{"rendered":"<p style=\"font-size:16px\">O polipropileno modificado \u00e9 um dos pl\u00e1sticos de melhor desempenho e \u00e9 frequentemente usado em projetos de engenharia de tubula\u00e7\u00f5es subterr\u00e2neas, como energia e comunica\u00e7\u00f5es, especialmente em cen\u00e1rios de constru\u00e7\u00e3o sem valas.<\/p>\n\n\n\n<p style=\"font-size:16px\">Neste artigo, exploraremos alguns aspectos b\u00e1sicos sobre o polipropileno modificado. Desde o desempenho, a composi\u00e7\u00e3o, as vantagens at\u00e9 as aplica\u00e7\u00f5es.<\/p>\n\n\n\n<p style=\"font-size:16px\">Vamos come\u00e7ar:<\/p>\n\n\n\t\t\t\t<div class=\"wp-block-uagb-table-of-contents uagb-toc__align-left uagb-toc__columns-1  uagb-block-cd1ad51c\"\n\t\t\t\t\tdata-scroll= \"1\"\n\t\t\t\t\tdata-offset= \"30\"\n\t\t\t\t\tstyle=\"\"\n\t\t\t\t>\n\t\t\t\t<div class=\"uagb-toc__wrap\">\n\t\t\t\t\t\t<div class=\"uagb-toc__title\">\n\t\t\t\t\t\t\tTabela de conte\u00fados\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"uagb-toc__list-wrap\">\n\t\t\t\t\t\t<ol class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#what-is-modified-polypropylene\" class=\"uagb-toc-link__trigger\">O que \u00e9 polipropileno modificado?<\/a><li class=\"uagb-toc__list\"><a href=\"#chemical-composition-of-modified-polypropylene\" class=\"uagb-toc-link__trigger\">Composi\u00e7\u00e3o qu\u00edmica do polipropileno modificado<\/a><li class=\"uagb-toc__list\"><a href=\"#characteristics-of-modified-polyethylene\" class=\"uagb-toc-link__trigger\">Caracter\u00edsticas do polietileno modificado<\/a><ul class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#high-wear-resistance\" class=\"uagb-toc-link__trigger\">Alta resist\u00eancia ao desgaste<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#enhanced-corrosion-resistance\" class=\"uagb-toc-link__trigger\">Maior resist\u00eancia \u00e0 corros\u00e3o<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#eexcellent-electrical-performance\" class=\"uagb-toc-link__trigger\">Excelente desempenho el\u00e9trico<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#surface-activity-improvement\" class=\"uagb-toc-link__trigger\">Melhoria da atividade da superf\u00edcie<\/a><\/li><\/ul><\/li><li class=\"uagb-toc__list\"><a href=\"#advantages-of-modified-polypropylene\" class=\"uagb-toc-link__trigger\">Vantagens do polipropileno modificado<\/a><ul class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#excellent-impact-resistance\" class=\"uagb-toc-link__trigger\">Excelente resist\u00eancia ao impacto<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#excellent-corrosion-resistance\" class=\"uagb-toc-link__trigger\">Excelente resist\u00eancia \u00e0 corros\u00e3o<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#anti-aging-ability-upgrade\" class=\"uagb-toc-link__trigger\">Atualiza\u00e7\u00e3o da capacidade antienvelhecimento<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#low-water-absorption\" class=\"uagb-toc-link__trigger\">Baixa absor\u00e7\u00e3o de \u00e1gua<\/a><\/li><\/ul><\/li><\/ul><\/li><li class=\"uagb-toc__list\"><a href=\"#application-of-modified-polypropylene\" class=\"uagb-toc-link__trigger\">Aplica\u00e7\u00e3o de polipropileno modificado<\/a><ul class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#power-pipeline\" class=\"uagb-toc-link__trigger\">Tubula\u00e7\u00e3o de energia<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#agricultural-irrigation-pipe\" class=\"uagb-toc-link__trigger\">Tubo de irriga\u00e7\u00e3o agr\u00edcola<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#drainage-pipes\" class=\"uagb-toc-link__trigger\">Tubos de drenagem<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class=\"uagb-toc__list\"><a href=\"#faq\" class=\"uagb-toc-link__trigger\">PERGUNTAS FREQUENTES<\/a><li class=\"uagb-toc__list\"><a href=\"#conclusion\" class=\"uagb-toc-link__trigger\">Conclus\u00e3o<\/a><\/ul><\/ul><\/ul><\/ol>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\n\n\n<div class=\"wp-block-uagb-container uagb-block-91adb274 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"500\" src=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Material-3.jpg\" alt=\"\" class=\"wp-image-1496\" srcset=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Material-3.jpg 750w, https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Material-3-300x200.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-b94f55da\"><h2 class=\"uagb-heading-text\">O que \u00e9 polipropileno modificado?<\/h2><\/div>\n\n\n\n<p style=\"font-size:16px\">O polietileno modificado \u00e9 um material polim\u00e9rico produzido por meio do ajuste da estrutura molecular do polietileno b\u00e1sico (PE) por meios f\u00edsicos, qu\u00edmicos ou biol\u00f3gicos, o que lhe confere desempenho superior ou novas fun\u00e7\u00f5es.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-f9c31768\"><h2 class=\"uagb-heading-text\">Composi\u00e7\u00e3o qu\u00edmica do polipropileno modificado<\/h2><\/div>\n\n\n\n<p style=\"font-size:16px\">O polietileno modificado pode melhorar sua dureza e resist\u00eancia ao impacto por meio de uma combina\u00e7\u00e3o de v\u00e1rios elementos.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-73c542cfa13ab791d359460cdc520628\" style=\"color:#858a93;font-size:16px\">Seus principais componentes s\u00e3o variantes funcionalizadas formadas pela introdu\u00e7\u00e3o de grupos funcionais espec\u00edficos ou pela composi\u00e7\u00e3o de outros materiais na espinha dorsal de carbono e hidrog\u00eanio do polietileno b\u00e1sico (-CH\u2082-CH\u2082-) por meios qu\u00edmicos ou f\u00edsicos.<\/p>\n\n\n\n<p style=\"font-size:16px\">Suas principais altera\u00e7\u00f5es incluem: \u2460 Modifica\u00e7\u00e3o de enxerto qu\u00edmico (como o enxerto de anidrido maleico para introduzir grupos polares -CO-CH=CH-CO- para melhorar a ades\u00e3o); \u2461 Modifica\u00e7\u00e3o de reticula\u00e7\u00e3o (formando uma estrutura de rede tridimensional -C-C- ou -Si-O-Si- para melhorar a resist\u00eancia ao calor); \u2462 Modifica\u00e7\u00e3o de clora\u00e7\u00e3o\/sulfona\u00e7\u00e3o (adi\u00e7\u00e3o de grupos -Cl ou -SO\u2083H para proporcionar propriedades de elast\u00f4mero); \u2463 Mistura e composi\u00e7\u00e3o (combina\u00e7\u00e3o com elast\u00f4meros POE, cargas de carbonato de c\u00e1lcio etc.) para otimizar as propriedades mec\u00e2nicas. para otimizar as propriedades mec\u00e2nicas).<\/p>\n\n\n\n<p style=\"font-size:16px\">O polietileno modificado n\u00e3o s\u00f3 ret\u00e9m o esqueleto de carbono e hidrog\u00eanio do PE original, mas tamb\u00e9m alcan\u00e7a avan\u00e7os na resist\u00eancia \u00e0 temperatura (-100 \u2103~120 \u2103), resist\u00eancia mec\u00e2nica e funcionaliza\u00e7\u00e3o (como isolamento, antibacteriano) por meio do design da estrutura molecular, sendo amplamente utilizado em cabos, tubula\u00e7\u00f5es, medicina e outros campos.<\/p>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-91cacbe1 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"450\" src=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/06\/PP-power-pipe.jpg\" alt=\"\" class=\"wp-image-1822\" srcset=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/06\/PP-power-pipe.jpg 600w, https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/06\/PP-power-pipe-300x225.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-ff8987e6\"><h2 class=\"uagb-heading-text\">Caracter\u00edsticas do polietileno modificado<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-e7157af4\"><h3 class=\"uagb-heading-text\">Alta resist\u00eancia ao desgaste<\/h3><p class=\"uagb-desc-text\">Maior resist\u00eancia \u00e0 tra\u00e7\u00e3o e ao desgaste: Variedades modificadas de peso molecular ultra-alto (como o UHMWPE) s\u00e3o usadas em materiais \u00e0 prova de balas e articula\u00e7\u00f5es artificiais, e sua resist\u00eancia ao desgaste \u00e9 mais de 5 vezes maior do que a do PE convencional.<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-c9f8e8e0\"><h3 class=\"uagb-heading-text\">Maior resist\u00eancia \u00e0 corros\u00e3o<\/h3><p class=\"uagb-desc-text\">Tolerantes a ambientes \u00e1cidos, alcalinos, solventes org\u00e2nicos e oxidantes, as variedades sulfonadas (com introdu\u00e7\u00e3o de grupos -SO\u2083H) s\u00e3o usadas para revestimentos de equipamentos qu\u00edmicos<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-dce48c63\"><h3 class=\"uagb-heading-text\">Excelente desempenho el\u00e9trico<\/h3><p class=\"uagb-desc-text\">Alta resist\u00eancia de isolamento (\uff1e10\u00b9\u2076 \u03a9-m) e for\u00e7a diel\u00e9trica (\uff1e30 kV\/mm), usada para isolamento de cabos de ultra-alta tens\u00e3o<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-ee588d2e\"><h3 class=\"uagb-heading-text\">Melhoria da atividade da superf\u00edcie<\/h3><p class=\"uagb-desc-text\">O enxerto de anidrido maleico introduz grupos polares (-CO-CH=CH-CO-) para resolver a in\u00e9rcia da superf\u00edcie original do PE e melhorar a impress\u00e3o\/ades\u00e3o<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-a01f52ee alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"450\" src=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Orange-cable-tube.jpg\" alt=\"\" class=\"wp-image-1036\" srcset=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Orange-cable-tube.jpg 600w, https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Orange-cable-tube-300x225.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-ccfa6e59\"><h2 class=\"uagb-heading-text\">Vantagens do polipropileno modificado<\/h2><\/div>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-6b1571e8\"><h3 class=\"uagb-heading-text\">Excelente resist\u00eancia ao impacto<\/h3><p class=\"uagb-desc-text\">A modifica\u00e7\u00e3o do cristal \u03b2 aumenta a resist\u00eancia ao impacto em baixa temperatura em 2 a 3 vezes, resolvendo o problema de fragilidade em baixa temperatura do PP comum<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-e2c102d6\"><h3 class=\"uagb-heading-text\">Excelente resist\u00eancia \u00e0 corros\u00e3o<\/h3><p class=\"uagb-desc-text\">Tolerantes a \u00e1cidos, \u00e1lcalis e solventes org\u00e2nicos, as variedades modificadas sulfonadas s\u00e3o usadas para revestimentos de equipamentos qu\u00edmicos<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-0e29f857\"><h3 class=\"uagb-heading-text\">Atualiza\u00e7\u00e3o da capacidade antienvelhecimento<\/h3><p class=\"uagb-desc-text\">A modifica\u00e7\u00e3o antioxidante retarda a degrada\u00e7\u00e3o dos raios UV e aumenta a vida \u00fatil em ambientes externos<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-754a1866\"><h3 class=\"uagb-heading-text\">Baixa absor\u00e7\u00e3o de \u00e1gua<\/h3><p class=\"uagb-desc-text\">A taxa de absor\u00e7\u00e3o de \u00e1gua \u00e9 inferior a 0,2%, e a estabilidade dimensional em um ambiente \u00famido \u00e9 melhor do que a maioria dos pl\u00e1sticos de engenharia<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-7cd71e17 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"500\" src=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Material-4.jpg\" alt=\"\" class=\"wp-image-1498\" srcset=\"https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Material-4.jpg 750w, https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/Material-4-300x200.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-d6ba134d\"><h2 class=\"uagb-heading-text\">Aplica\u00e7\u00e3o de polipropileno modificado<\/h2><\/div>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-8551d7ba\"><h3 class=\"uagb-heading-text\">Tubula\u00e7\u00e3o de energia<\/h3><p class=\"uagb-desc-text\">Usado para a constru\u00e7\u00e3o de tubos de alta tens\u00e3o acima de 10kV em projetos de energia municipal para reduzir os danos nas estradas. Adequado para \u00e1reas sens\u00edveis, como locais hist\u00f3ricos e rodovias<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-a4cd75aa\"><h3 class=\"uagb-heading-text\">Tubo de irriga\u00e7\u00e3o agr\u00edcola<\/h3><p class=\"uagb-desc-text\">Proteger os cabos do equipamento de irriga\u00e7\u00e3o, resistentes \u00e0 corros\u00e3o do solo salino-alcalino (vida \u00fatil &gt; 15 anos em ambiente com pH 8,5)<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-23135544\"><h3 class=\"uagb-heading-text\">Tubos de drenagem<\/h3><p class=\"uagb-desc-text\">Resistente \u00e0 corros\u00e3o qu\u00edmica, ecologicamente correto e n\u00e3o t\u00f3xico, substituindo o metal <a href=\"https:\/\/fshualinkeji.com\/pt\/tubo-de-pe\/\">tubos<\/a> para resolver problemas de ferrugem<\/p><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-5a351673\"><h2 class=\"uagb-heading-text\">PERGUNTAS FREQUENTES<\/h2><\/div>\n\n\n\n<p style=\"font-size:16px\">1. o polietileno modificado \u00e9 prejudicial ao corpo humano?<\/p>\n\n\n\n<p style=\"font-size:16px\">O polietileno modificado \u00e9 est\u00e1vel em temperatura ambiente, n\u00e3o tem libera\u00e7\u00e3o de t\u00f3xicos e n\u00e3o causa riscos \u00e0 sa\u00fade quando em contato normal com a pele ou como material de embalagem.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-d2c0fb33\"><h2 class=\"uagb-heading-text\">Conclus\u00e3o<\/h2><\/div>\n\n\n\n<p style=\"font-size:16px\">O polipropileno modificado \u00e9 um material pl\u00e1stico relativamente est\u00e1vel, com boa resist\u00eancia \u00e0 corros\u00e3o, ao envelhecimento e ao calor. Tamb\u00e9m \u00e9 muito f\u00e1cil de fabricar. Desde que voc\u00ea entenda completamente esse material, poder\u00e1 fabricar tubos confi\u00e1veis e de alta resist\u00eancia para aplica\u00e7\u00f5es exigentes.<\/p>","protected":false},"excerpt":{"rendered":"<p>Modified polypropylene is one of the best performing plastics and is often used in underground pipeline engineering design such as [&hellip;]<\/p>","protected":false},"author":1,"featured_media":1052,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"unboxed","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":"","ast-disable-related-posts":"","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-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"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-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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pipes\";s:5:\"depth\";i:3;}i:16;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:3:\"faq\";s:7:\"content\";s:3:\"FAQ\";s:5:\"depth\";i:2;}i:17;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:10:\"conclusion\";s:7:\"content\";s:10:\"Conclusion\";s:5:\"depth\";i:2;}}}"],"_uag_css_file_name":["uag-css-2103.css"],"_uag_js_file_name":["uag-js-2103.js"]},"uagb_featured_image_src":{"full":["https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/MPP-Pipe-Applications-1.jpg",750,500,false],"thumbnail":["https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/MPP-Pipe-Applications-1-150x150.jpg",150,150,true],"medium":["https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/MPP-Pipe-Applications-1-300x200.jpg",300,200,true],"medium_large":["https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/MPP-Pipe-Applications-1.jpg",750,500,false],"large":["https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/MPP-Pipe-Applications-1.jpg",750,500,false],"1536x1536":["https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/MPP-Pipe-Applications-1.jpg",750,500,false],"2048x2048":["https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/MPP-Pipe-Applications-1.jpg",750,500,false],"trp-custom-language-flag":["https:\/\/fshualinkeji.com\/wp-content\/uploads\/2025\/05\/MPP-Pipe-Applications-1.jpg",18,12,false]},"uagb_author_info":{"display_name":"Hualinpipe","author_link":"https:\/\/fshualinkeji.com\/pt\/author\/juntongtechoutlook-com\/"},"uagb_comment_info":0,"uagb_excerpt":"Modified polypropylene is one of the best performing plastics and is often used in underground pipeline engineering design such as 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