{"id":4979,"date":"2018-12-12T08:56:12","date_gmt":"2018-12-12T08:56:12","guid":{"rendered":"https:\/\/www.witton.com\/case-studies\/free-radical-polymerisation-and-polymer-modification\/"},"modified":"2024-03-18T10:44:20","modified_gmt":"2024-03-18T10:44:20","slug":"polymerisation-freier-radikale-und-polymermodifikation","status":"publish","type":"case_studies","link":"https:\/\/www.witton.com\/de\/case-studies\/polymerisation-freier-radikale-und-polymermodifikation\/","title":{"rendered":"Polymerisation freier Radikale und Polymermodifikation"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">An international polymer manufacturer needed extra capacity for one their existing products. This involved a 4 four stage process; first <a href=\"https:\/\/goldbook.iupac.org\/terms\/view\/P04740\" target=\"_blank\" rel=\"noopener\" title=\"polymerisation \">polymerisation <\/a>followed by solvent exchange then polymer modification by partial hydrolysis and finally solvent removal.<br\/><br\/><\/p>\n\n<h2 class=\"wp-block-heading\"><strong>Initial work<\/strong>\u00a0was based on our customer\u2019s processing steps:<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Lab scale manufacture of the 1<sup>st<\/sup>&nbsp;stage polymer manufacture was successful but scale up problems were identified due to:\n<ul class=\"wp-block-list\">\n<li>mixing of the monomer and neat initiator prior to feeding into the reactor required a chilled mixing vessel<\/li>\n\n\n\n<li>extremely high viscosity during the 2<sup>nd<\/sup>\u00a0stage solvent exchange meant we could not process this with our current equipment.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\"><strong>Due to these problems<\/strong>\u00a0and the costs and delays that installing new equipment would entail our customer supplied their polymer for the 3<sup>rd<\/sup>\u00a0and 4<sup>th<\/sup>\u00a0steps:<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>the modification of this polymer was <a href=\"https:\/\/www.witton.com\/services\/process-development\/\" title=\"Process Development at Witton Chemical\">scaled up from the lab<\/a> to multi-tonne scale. Our final batch size was ~50% larger than our customers biggest.<\/li>\n\n\n\n<li>a new test method was developed to follow the process.<\/li>\n\n\n\n<li>the solvent removal was optimised for our equipment which allowed a reduction in total waste generation.<\/li>\n<\/ul>\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\"><strong>While the second project<\/strong>\u00a0was undertaken in parallel we:<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>identified a new process to manufacture the 1<sup>st<\/sup>\u00a0stage polymer that avoided the initiator\/monomer mixture and the solvent exchange<\/li>\n\n\n\n<li>worked closely with the customer to demonstrate that lab samples made to this new process gave encouraging performance results.<\/li>\n\n\n\n<li>set up plans to validate this by pilot plant trials to provide enough material for real world application testing.<\/li>\n<\/ul>\n","protected":false},"template":"","class_list":["post-4979","case_studies","type-case_studies","status-publish","hentry"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"An international polymer company needed extra capacity for one their existing products. 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