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Rapid Commun."],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The segmental dynamics of the side chains of poly(norbornene)\u2010<jats:italic>g<\/jats:italic>\u2010poly(propylene oxide) (PNB\u2010<jats:italic>g<\/jats:italic>\u2010PPO) bottlebrush polymer in comparison to PPO is studied by quasi\u2010elastic neutron scattering. Having experimental time and length scale information simultaneously allows to extract spatial information in addition to relaxation time. Tethering one end of the PPO side chain onto a stiff PNB backbone slows down the segmental relaxation, over the length and time scales investigated. The power law dependence of the relaxation time on the momentum transfer,<jats:italic>Q<\/jats:italic>, indicates a more heterogeneous relaxation pattern for the bottlebrush polymer, whereas the linear PPO has less deviations from a homogenous relaxation. Similar conclusions can be drawn from the time dependent mean square displacement, \u2329<jats:italic>r<\/jats:italic><jats:sup>2<\/jats:sup>(<jats:italic>t<\/jats:italic>)\u232a, and the non\u2010Gaussian parameter,<jats:italic>\u03b1<\/jats:italic><jats:sub>2<\/jats:sub>(<jats:italic>t<\/jats:italic>). Herein, the bottlebrush polymer shows a more restricted dynamics, whereas the linear PPO reaches \u2329<jats:italic>r<\/jats:italic><jats:sup>2<\/jats:sup>(<jats:italic>t<\/jats:italic>)\u232a\u221d<jats:italic>t<\/jats:italic><jats:sup>0.5<\/jats:sup>at the highest temperature. The deviations from Gaussian behavior are evident at the<jats:italic>\u03b1<\/jats:italic><jats:sub>2<\/jats:sub>(<jats:italic>t<\/jats:italic>). Both samples show a decaying<jats:italic>\u03b1<\/jats:italic><jats:sub>2<\/jats:sub>(<jats:italic>t<\/jats:italic>). The non\u2010Gaussian parameter supports the results from the power law dependence of the relaxation times, with lower<jats:italic>\u03b1<\/jats:italic><jats:sub>2<\/jats:sub>(<jats:italic>t<\/jats:italic>) values for PPO compared to those for PNB\u2010g\u2010PPO, pointing to less deviations from Gaussian behavior.<\/jats:p>","DOI":"10.1002\/marc.202200902","type":"journal-article","created":{"date-parts":[[2022,12,24]],"date-time":"2022-12-24T06:12:06Z","timestamp":1671862326000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Side Chain Dynamics of Poly(norbornene)\u2010<i>g<\/i>\u2010Poly(propylene oxide) Bottlebrush Polymers"],"prefix":"10.1002","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8666-1859","authenticated-orcid":false,"given":"Karin J.","family":"Bichler","sequence":"first","affiliation":[{"name":"Department of Chemistry Louisiana State University Baton Rouge Louisiana 70803 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bruno","family":"Jakobi","sequence":"additional","affiliation":[{"name":"Department of Chemistry Louisiana State University Baton Rouge Louisiana 70803 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alice","family":"Klapproth","sequence":"additional","affiliation":[{"name":"Australian Nuclear Science and Technology Organisation New Illawarra Road Lucas Heights NSW 2234 Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taiki","family":"Tominaga","sequence":"additional","affiliation":[{"name":"Neutron Science and Technology Center Comprehensive Research Organization for Science and Society (CROSS) Tokai 319\u20101106 Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Richard A.","family":"Mole","sequence":"additional","affiliation":[{"name":"Australian Nuclear Science and Technology Organisation New Illawarra Road Lucas Heights NSW 2234 Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gerald J.","family":"Schneider","sequence":"additional","affiliation":[{"name":"Department of Chemistry Louisiana State University Baton Rouge Louisiana 70803 USA"},{"name":"Department of Physics &amp; Astronomy Louisiana State University Baton Rouge Louisiana 70803 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,1,15]]},"reference":[{"key":"e_1_2_9_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/macp.201200064"},{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.0c02104"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.1c00834"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.0c01846"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.2c00327"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.nanolett.1c01379"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.0c01277"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/ma070288d"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsmacrolett.2c00053"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.macromol.2c00254"},{"key":"e_1_2_9_11_1","volume-title":"Polymer data handbook","author":"Mark J. 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