{"id":838,"date":"2017-05-08T11:06:53","date_gmt":"2017-05-08T09:06:53","guid":{"rendered":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/?p=838"},"modified":"2017-05-19T09:32:04","modified_gmt":"2017-05-19T07:32:04","slug":"talk-by-m-schulz-at-mlu-may-16-2017","status":"publish","type":"post","link":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/2017\/05\/talk-by-m-schulz-at-mlu-may-16-2017\/","title":{"rendered":"Talk by M. Schulz at MLU (May 16, 2017)"},"content":{"rendered":"<h3>Effects of the \u03b1<sub>C<\/sub>-relaxation for PEO and POM:\u00a0Impact on Crystallization Process, Morphology and Reorganization Behavior<\/h3>\n<p>Depending on the presence or absence of an \u03b1<sub>C<\/sub>-relaxation it is possible to distinguish between crystal-mobile and crystal-fixed semi-crystalline polymers. Only crystal-mobile polymers own a certain chain mobility in the crystalline phase. In contrast to the crystal-fixed polymer Polycaprolactone (PCL), we analyze the impact of the \u03b1<sub>C<\/sub>-relaxation for two representatives of \u03b1<sub>C<\/sub>-mobile polymers, Polyethylenoxide (PEO) and Polyoxymethylene (POM), using different methods like SAXS and Flash-\/DSC.<\/p>\n<p><!--more-->SAXS-measurements show that crystal-fixed polymers follow the expectations of classical crystallization theories. The crystal thickness is determined by the crystallization temperature T<sub>c<\/sub>. In contrast the crystal-mobile polymers shows a thickening of the crystalline lamellae up to a minimal thickness of the amorphous regions, enabled trough the \u03b1<sub>C<\/sub>-relaxation. As a consequence, crystal-mobile and crystal-fixed polymers exhibit a different reorganization behavior during heating. The crystallization of PCL leads to the formation of marginally stable crystallites which constantly reorganize during heating, while in PEO and POM due to the presence of the \u03b1<sub>C<\/sub>-relaxation, much more stable (thickened) lamellar crystals form, which melt only at much higher temperatures. Crystallization at low temperatures on the other hand seems to suppress the \u03b1<sub>C<\/sub>-induced stabilization also in PEO.<\/p>\n<pre>Location: MLU, Von-Danckelmann-Platz 3, SR 1.09\r\nTime: 3.30pm<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Effects of the \u03b1C-relaxation for PEO and POM:\u00a0Impact on Crystallization Process, Morphology and Reorganization Behavior Depending on the &hellip; <a href=\"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/2017\/05\/talk-by-m-schulz-at-mlu-may-16-2017\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Talk by M. Schulz at MLU (May 16, 2017)&#8221;<\/span><\/a><\/p>\n","protected":false},"author":4475,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[45,44],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/posts\/838"}],"collection":[{"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/users\/4475"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/comments?post=838"}],"version-history":[{"count":8,"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/posts\/838\/revisions"}],"predecessor-version":[{"id":857,"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/posts\/838\/revisions\/857"}],"wp:attachment":[{"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/media?parent=838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/categories?post=838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.urz.uni-halle.de\/irtgpolymers\/wp-json\/wp\/v2\/tags?post=838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}