{"id":105,"date":"2021-07-08T11:23:20","date_gmt":"2021-07-08T09:23:20","guid":{"rendered":"https:\/\/web.umons.ac.be\/smos\/?p=105"},"modified":"2022-05-23T14:25:56","modified_gmt":"2022-05-23T12:25:56","slug":"new-paper-in-collaboration-with-the-laboratory-of-polymeric-and-composite-materials-umons","status":"publish","type":"post","link":"https:\/\/web.umons.ac.be\/smos\/2021\/07\/08\/new-paper-in-collaboration-with-the-laboratory-of-polymeric-and-composite-materials-umons\/","title":{"rendered":"New paper in Collaboration with the Laboratory of Polymeric and Composite Materials (UMONS)"},"content":{"rendered":"
\"Accelerating
Accelerating effect of crown ethers on the lactide polymerization catalysed by potassium acetate<\/figcaption><\/figure>\n

Recent advances in catalysis enriched the toolbox to prepare well-defined polyester materials such as polylactide (PLA). Herein, we report the use of crown ethers to speed up the polymerization of L-lactide (L-LA) initiated by an exogenous alcohol and catalyzed by potassium acetate (KOAc). With KOAc, the crown ethers played a crucial role as a complexing agent, with 18-crown-6 enabling the fastest polymerization kinetics outpacing the one obtained with the pristine catalyst by not less than 73. Experimental results suggested that the 18-c-6 crown ether complexed the KOAc ion pair to in situ produce free ions, which was much more appropriate to activate the propagating alcohol for the ring-opening reaction of L-LA.<\/p>\n

https:\/\/doi.org\/10.1039\/D1CY00756D<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Recent advances in catalysis enriched the toolbox to prepare well-defined polyester materials such as polylactide (PLA). Herein, we report the use of crown ethers to speed up the polymerization of L-lactide (L-LA) initiated by an exogenous alcohol and catalyzed by potassium acetate (KOAc).<\/p>\n","protected":false},"author":157,"featured_media":106,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-105","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-recherche"],"yoast_head":"\nNew paper in Collaboration with the Laboratory of Polymeric and Composite Materials (UMONS) - Service \/ FS - Synth\u00e8se et Spectrom\u00e9trie de Masse Organiques<\/title>\n<meta name=\"robots\" content=\"index,follow\" \/>\n<link rel=\"canonical\" href=\"https:\/\/web.umons.ac.be\/smos\/2021\/07\/08\/new-paper-in-collaboration-with-the-laboratory-of-polymeric-and-composite-materials-umons\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New paper in Collaboration with the Laboratory of Polymeric and Composite Materials (UMONS) - Service \/ FS - Synth\u00e8se et Spectrom\u00e9trie de Masse Organiques\" \/>\n<meta property=\"og:description\" content=\"Recent advances in catalysis enriched the toolbox to prepare well-defined polyester materials such as polylactide (PLA). Herein, we report the use of crown ethers to speed up the polymerization of L-lactide (L-LA) initiated by an exogenous alcohol and catalyzed by potassium acetate (KOAc).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/web.umons.ac.be\/smos\/2021\/07\/08\/new-paper-in-collaboration-with-the-laboratory-of-polymeric-and-composite-materials-umons\/\" \/>\n<meta property=\"og:site_name\" content=\"Service \/ FS - Synth\u00e8se et Spectrom\u00e9trie de Masse Organiques\" \/>\n<meta property=\"article:published_time\" content=\"2021-07-08T09:23:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-05-23T12:25:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/web.umons.ac.be\/app\/uploads\/sites\/80\/2022\/05\/article-2021-07-08.png\" \/>\n\t<meta property=\"og:image:width\" content=\"771\" \/>\n\t<meta property=\"og:image:height\" content=\"730\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Eric Weverbergh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Eric Weverbergh\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/web.umons.ac.be\/smos\/2021\/07\/08\/new-paper-in-collaboration-with-the-laboratory-of-polymeric-and-composite-materials-umons\/\",\"url\":\"https:\/\/web.umons.ac.be\/smos\/2021\/07\/08\/new-paper-in-collaboration-with-the-laboratory-of-polymeric-and-composite-materials-umons\/\",\"name\":\"New paper in Collaboration with the Laboratory of Polymeric and Composite Materials (UMONS) - 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