{"id":1347,"date":"2020-01-07T13:28:44","date_gmt":"2020-01-07T12:28:44","guid":{"rendered":"http:\/\/rariplast.iimage.net\/2020\/01\/07\/la-scoperta-del-polipropilene-isotattico\/"},"modified":"2023-04-12T11:24:54","modified_gmt":"2023-04-12T09:24:54","slug":"the-discovery-of-isotactic-polypropylene","status":"publish","type":"post","link":"https:\/\/www.rariplast.com\/en\/2020\/01\/07\/the-discovery-of-isotactic-polypropylene\/","title":{"rendered":"The discovery of isotactic polypropylene"},"content":{"rendered":"<p class=\"p\"><span lang=\"EN-GB\">It all started back in 1952, when Professor Giulio Natta learned that the German chemist Karl Ziegler <strong>had prepared linear and highly crystalline polyethylene using new catalytic systems<\/strong> based on triethylaluminium and transition metal salts as co-catalysts.<\/span><\/p>\n<p class=\"p\"><span lang=\"EN-GB\">Realising that Ziegler\u2019s discovery could be applied to the polymerisation of propylene, <strong>Natta set up a research group with highly skilled young chemists and technologists<\/strong>, who worked on an innovative process to obtain linear and highly crystalline polypropylene. Their work paid off \u2013 so much so that they developed processes capable of synthesising an entire family of polymers suitable for crystallisation, such as polystyrene, polybutene, polybutadiene, polypentene, polymethylpentene, and more.<\/span><\/p>\n<h3>The importance of the discovery of isotactic polypropylene<\/h3>\n<p>The research carried out by Prof. Natta and his collaborators <strong>was extremely important, because it clarified<\/strong> not only the kinetic mechanisms that regulated the polymerisation processes, but also <strong>the molecular factors that made these polymers intrinsically capable of crystallising<\/strong>.<\/p>\n<h3>What were these factors?<\/h3>\n<p>A vinyl polymer crystallised if each repeat unit contained a tertiary carbon atom which, in a macromolecule of finite length, represented an asymmetric centre.<\/p>\n<p><strong>The discovery of \u2018stereoregular\u2019 and therefore crystallisable polyolefin polymers<\/strong> earned Giulio Natta the <strong>Nobel Prize<\/strong> <strong>in 1963<\/strong> in collaboration with Karl Ziegler as the discoverer of organometallic catalysis and low-pressure polyethylene synthesis.<\/p>\n<p>Meanwhile, Montecatini, which had opened the first major European petrochemical plant in Ferrara in 1952, began producing isotactic polypropylene there, enjoying great success.<\/p>\n<p>I<strong>n recognition of the scientific, technological and industrial significance of this discovery<\/strong>, the Swedish and Italian post offices even printed <strong>commemorative stamps<\/strong> in 1988 and 1994, while Prof. Natta was awarded one of the world\u2019s most important prizes.<\/p>\n<p>Intrigued by the history of this <span lang=\"EN-GB\">thermoplastic polymer<\/span>?<\/p>\n<p><strong>Contact us to find out how we use isotactic polypropylene and what applications it could have for your business!<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>It all started back in 1952, when Professor Giulio Natta learned that [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1140,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-1347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hdpe-pvc-pp-pastics"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - 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