

{"id":6316,"date":"2026-02-11T10:31:58","date_gmt":"2026-02-11T09:31:58","guid":{"rendered":"https:\/\/jtc.uni-halle.de\/?p=6316"},"modified":"2026-02-13T07:55:21","modified_gmt":"2026-02-13T06:55:21","slug":"vitrimeric-polymers","status":"publish","type":"post","link":"https:\/\/jtc.uni-halle.de\/en\/vitrimeric-polymers\/","title":{"rendered":"Vitrimeric Polymers"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;Hero section&#8221; module_class=&#8221;relaunch&#8221; _builder_version=&#8221;4.27.3&#8243; _module_preset=&#8221;default&#8221; transform_scale_tablet=&#8221;&#8221; transform_scale_phone=&#8221;&#8221; transform_scale_last_edited=&#8221;on|tablet&#8221; transform_translate_tablet=&#8221;&#8221; transform_translate_phone=&#8221;&#8221; transform_translate_last_edited=&#8221;on|tablet&#8221; transform_translate_linked_tablet=&#8221;off&#8221; transform_rotate_tablet=&#8221;&#8221; transform_rotate_phone=&#8221;&#8221; transform_rotate_last_edited=&#8221;on|tablet&#8221; 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border_color_all=&#8221;#2e2e2e&#8221; global_colors_info=&#8221;{}&#8221; custom_css_main_element_last_edited=&#8221;on|desktop&#8221; custom_css_main_element_tablet=&#8221;margin-top: -2rem;&#8221; custom_css_main_element_phone=&#8221;margin-top: -2rem;&#8221;][et_pb_text quote_border_weight=&#8221;0px&#8221; admin_label=&#8221;Zitat-Box&#8221; _builder_version=&#8221;4.27.3&#8243; _module_preset=&#8221;default&#8221; text_font=&#8221;||||||||&#8221; quote_font=&#8221;|700|||||||&#8221; custom_margin=&#8221;||||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<blockquote>\n<p>Metal-free Latent Catalysts For Vitrimeric Polyesters<\/p>\n<\/blockquote>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.27.3&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Foto: <span>AI generated (OpenAI)<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_2,1_2&#8243; _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; width=&#8221;91.1%&#8221; custom_margin=&#8221;|||40px||&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p style=\"text-align: justify;\">The Innovations Team B7 is dedicated to incorporating the vitrimeric nature into materials by developing metal-free latent catalyst systems that are activated at high temperatures. This strategy aims to facilitate efficient recycling processes without compromising the polymers\u2019 inherent properties. Our primary focus is directed on polyesters and polyester amides, widely used in various applications, such as structural materials, fibers, or cable insulation. By fine-tuning the activation energy during the reprocessing-step via control of the catalytical activity, we aim to create an environment where these materials can be reprocessed and recycled without considerable deterioration of their properties, in turn enabling multiple life-cycles. We are further exploring reprocessing methods through 3D printing technology, enabling the creation of a more complex thermoset design via extrusion-based printing, opening new avenues for advanced material applications.<\/p>\n<p style=\"text-align: justify;\">[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; width=&#8221;91%&#8221; custom_margin=&#8221;|||40px||&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>Latent Vitrimeric Reshaping of Polyesters: Capped Amines and N-Heterocyclic Carbenes as Triggered Catalysts<\/h2>\n<p style=\"text-align: justify;\">We report latent catalysts for a thermally triggered transesterification in polyester vitrimers, enabling a triggered dynamic bond exchange so offering a versatile platform for reprocessable polyesters. The blocked catalysts, such as N-heterocyclic carbenes (NHC\u2013CO2) and the organic amine salt, triazabicyclo[4.4.0]dec-5-ene (TBD)-methanesulfonic acid (MSA), TBD:MSA, are inactive under service conditions but active at elevated temperature or shear to enable a triggered, reversible covalent bond exchange. Catalyst activation was validated in model reactions with the salt TBD:MSA as an excellent candidate to promote transesterification at 150 \u00b0C with activation energies of 34\u201336 kJ\u00b7mol\u20131 as probed by melt-rheology inside a vitrimer composed of poly(2-hydroxyethyl)-acrylate (PHEA, Mn = 68.7 kDa) and dimethyl glutarate (DMG). Mechanical testing confirmed that both pristine (E = 0.03 MPa) and reprocessed (E = 0.11 MPa) samples retained tensile properties, demonstrating efficient recyclability. In contrast, the blocked N-heterocyclic carbene (NHC\u2013CO2) allowed an only one-time triggered activation, indicative of permanently crosslinked networks after its initial catalytic activity.<\/p>\n<p><a href=\"https:\/\/doi.org\/10.1021\/polymscitech.5c00118\">https:\/\/doi.org\/10.1021\/polymscitech.5c00118<\/a><\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2026\/02\/B7-Vitrimer-latent-cat.png&#8221; title_text=&#8221;B7-Vitrimer-latent-cat&#8221; _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; custom_padding_last_edited=&#8221;on|desktop&#8221; disabled_on=&#8221;on|on|on&#8221; admin_label=&#8221;Publikationen section BG&#8221; 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_module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<div class=\"blog-personen swiper slider-container\" data-arrows=\"false\" data-dots=\"false\"><div class=\"swiper-wrapper\"><div class=\"swiper-slide\"><div class=\"blog-item\"><h3><a href=\"https:\/\/jtc.uni-halle.de\/en\/mrunal-karle\/\">Mrunal Karle<\/a><\/h3><div class=\"excerpt\">Research Assistant<\/div><a class=\"read-more\" href=\"https:\/\/jtc.uni-halle.de\/en\/mrunal-karle\/\">Read more<\/a><div class=\"thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1280\" src=\"https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8943.webp\" class=\"attachment-full size-full wp-post-image\" alt=\"\" srcset=\"https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8943.webp 1920w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8943-1280x853.webp 1280w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8943-980x653.webp 980w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8943-480x320.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1920px, 100vw\" \/><\/div><\/div><\/div><div class=\"swiper-slide\"><div class=\"blog-item\"><h3><a href=\"https:\/\/jtc.uni-halle.de\/en\/philipp-hilgeroth\/\">Philipp Hilgeroth<\/a><\/h3><div class=\"excerpt\">Research Assistant<\/div><a class=\"read-more\" href=\"https:\/\/jtc.uni-halle.de\/en\/philipp-hilgeroth\/\">Read more<\/a><div class=\"thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1280\" src=\"https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8960.webp\" class=\"attachment-full size-full wp-post-image\" alt=\"\" srcset=\"https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8960.webp 1920w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8960-1280x853.webp 1280w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8960-980x653.webp 980w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8960-480x320.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1920px, 100vw\" \/><\/div><\/div><\/div><div class=\"swiper-slide\"><div class=\"blog-item\"><h3><a href=\"https:\/\/jtc.uni-halle.de\/en\/dr-zviadi-katcharava\/\">Dr. Zviadi Katcharava<\/a><\/h3><div class=\"excerpt\">Teamleader<\/div><a class=\"read-more\" href=\"https:\/\/jtc.uni-halle.de\/en\/dr-zviadi-katcharava\/\">Read more<\/a><div class=\"thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1280\" src=\"https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8888.webp\" class=\"attachment-full size-full wp-post-image\" alt=\"\" srcset=\"https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8888.webp 1920w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8888-1280x853.webp 1280w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8888-980x653.webp 980w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8888-480x320.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1920px, 100vw\" \/><\/div><\/div><\/div><div class=\"swiper-slide\"><div class=\"blog-item\"><h3><a href=\"https:\/\/jtc.uni-halle.de\/en\/tshepiso-tema\/\">Tshepiso Tema<\/a><\/h3><div class=\"excerpt\">Research Assistant<\/div><a class=\"read-more\" href=\"https:\/\/jtc.uni-halle.de\/en\/tshepiso-tema\/\">Read more<\/a><div class=\"thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1280\" src=\"https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8918.webp\" class=\"attachment-full size-full wp-post-image\" alt=\"\" srcset=\"https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8918.webp 1920w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8918-1280x853.webp 1280w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8918-980x653.webp 980w, https:\/\/jtc.uni-halle.de\/wp-content\/uploads\/2025\/06\/b8918-480x320.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1920px, 100vw\" \/><\/div><\/div><\/div><\/div><\/div>[\/et_pb_code][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The life-cycle of polymers remains a critical concern for modern society, as the large-scale production of plastics demands solutions that are both ecologically responsible and economically viable. Vitrimers, a novel class of materials, merge the best features of the two main types of polymers: thermosets and thermoplastics, offering enhanced durability, recyclability, and self-healing abilities. Traditional thermosets, which are crosslinked permanent polymer networks, are widely favored for their mechanical strength and chemical resistance, but they are difficult to recycle once cured. In contrast, thermoplastic polymers can be melted and reshaped, but often lack the necessary stability required for more demanding applications. Vitrimers overcome these limitations by embedding dynamic bond exchange, allowing their reprocessability at high temperatures, while retaining structural integrity under operating conditions.<\/p>\n","protected":false},"author":20,"featured_media":19367,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"2880","inline_featured_image":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":""},"categories":[62,68,58],"tags":[],"class_list":["post-6316","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","category-relaunch-en","category-b7-en"],"_links":{"self":[{"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/posts\/6316","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/comments?post=6316"}],"version-history":[{"count":16,"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/posts\/6316\/revisions"}],"predecessor-version":[{"id":19920,"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/posts\/6316\/revisions\/19920"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/media\/19367"}],"wp:attachment":[{"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/media?parent=6316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/categories?post=6316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtc.uni-halle.de\/en\/wp-json\/wp\/v2\/tags?post=6316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}