Position-dependent segmental relaxation in Bottlebrush polymers

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dc.contributor.authorBichler, KJen_AU
dc.contributor.authorJakobi, Ben_AU
dc.contributor.authorKlapproth, Aen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorSchneider, GJen_AU
dc.date.accessioned2024-10-04T01:07:12Zen_AU
dc.date.available2024-10-04T01:07:12Zen_AU
dc.date.issued2024-05-11en_AU
dc.date.statistics2024-10-02en_AU
dc.description.abstractSegmental dynamics of specifically labeled poly(propylene oxide), PPO, based bottlebrush polymers, PNB-<i>g</i>-PPO, were studied using quasi-elastic neutron scattering. The focus was set to different parts of the side chains to investigate the hypothetical gradual relaxation behavior within the side chains of a bottlebrush polymer. Different sections of the side chains were highlighted for QENS via sequential polymerization of protonated and deuterated monomers to allow the study of the relaxation behavior of the inner and outer parts of the side chain separately. A comparison of these two parts reveals a slowdown due to the grafting process happening across the different regions. This is seen for the segmental relaxation time as well as on the time-dependent mean-square displacement. Additionally, the non-Gaussian parameter, α, shows a decreasing difference from Gaussian behavior with the distance to the backbone. Altogether, this leads to the conclusion that gradual relaxation behavior exists. © 2024 The Authors. Published by American Chemical Society. - Open Access CC BY licence.en_AU
dc.description.sponsorshipWe acknowledge funding by the U.S. Department of Energy (DoE) under Grant DE-SC0019050. We are also grateful for the access to the neutron scattering instruments, provided by ACNS, Sydney, Australia (Pelican: P15734 and Emu: P15710). Mass spectrometry experiments were performed at the LSU Mass Spectrometry Facility (MSF). The Bruker UltrafleXtreme MALDI instrument was supported by NIH (Grant 1S10RR024520-01A1).en_AU
dc.format.mediumElectronic-eCollectionen_AU
dc.identifier.citationBichler, K. J., Jakobi, B., Klapproth, A., Mole, R. A., & Schneider, G. J. (2024). Position-dependent segmental relaxation in Bottlebrush polymers. Macromolecules, 57(10), 4729-4736. doi:10.1021/acs.macromol.4c00243en_AU
dc.identifier.issn0024-9297en_AU
dc.identifier.issn1520-5835en_AU
dc.identifier.issue10en_AU
dc.identifier.journaltitleMacromoleculesen_AU
dc.identifier.pagination4729-4736en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.macromol.4c00243en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15734en_AU
dc.identifier.volume57en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectPolymersen_AU
dc.subjectPositioningen_AU
dc.subjectRelaxationen_AU
dc.subjectNeutronsen_AU
dc.subjectChainsen_AU
dc.subjectPolymerizationen_AU
dc.subjectDeuterationen_AU
dc.subjectMass spectrometersen_AU
dc.subjectScatteringen_AU
dc.titlePosition-dependent segmental relaxation in Bottlebrush polymersen_AU
dc.typeJournal Articleen_AU
dcterms.dateAccepted2024-05-07en_AU
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