Show simple item record

dc.contributor.authorLi, Buxuan
dc.contributor.authorDeAngelis, Freddy
dc.contributor.authorChen, Gang
dc.contributor.authorHenry, Asegun
dc.date.accessioned2023-05-31T15:06:25Z
dc.date.available2023-05-31T15:06:25Z
dc.date.issued2022
dc.identifier.urihttps://hdl.handle.net/1721.1/150830
dc.description.abstract<jats:title>Abstract</jats:title><jats:p>Polymers are a unique class of materials from the perspective of normal mode analysis. Polymers consist of individual chains with repeating units and strong intra-chain covalent bonds, and amorphous arrangements among chains with weak inter-chain van der Waals and for some polymers also electrostatic interactions. Intuitively, this strong heterogeneity in bond strength can give rise to special features in the constituent phonons, but such effects have not been studied deeply before. Here, we use lattice dynamics and molecular dynamics to perform modal analysis of the thermal conductivity in amorphous polymers. We find an abnormally large population of localized modes in amorphous polymers, which is fundamentally different from amorphous inorganic materials. Contrary to the common picture of thermal transport, localized modes in amorphous polymers are found to be the dominant contributors to thermal conductivity. We find that a significant portion of the localization happens within individual chains, but heat is dominantly conducted when localized modes involve two chains. These results suggest localized modes generally play a key role in thermal transport for different polymers. The results provide an alternative perspective on why polymer thermal conductivity is generally quite low and gives insight into how to potentially change it.</jats:p>en_US
dc.language.isoen
dc.publisherSpringer Science and Business Media LLCen_US
dc.relation.isversionof10.1038/S42005-022-01103-Xen_US
dc.rightsCreative Commons Attributionen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceNatureen_US
dc.titleThe importance of localized modes spectral contribution to thermal conductivity in amorphous polymersen_US
dc.typeArticleen_US
dc.identifier.citationLi, Buxuan, DeAngelis, Freddy, Chen, Gang and Henry, Asegun. 2022. "The importance of localized modes spectral contribution to thermal conductivity in amorphous polymers." Communications Physics, 5 (1).
dc.contributor.departmentMassachusetts Institute of Technology. Department of Mechanical Engineeringen_US
dc.relation.journalCommunications Physicsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2023-05-31T15:02:53Z
dspace.orderedauthorsLi, B; DeAngelis, F; Chen, G; Henry, Aen_US
dspace.date.submission2023-05-31T15:02:55Z
mit.journal.volume5en_US
mit.journal.issue1en_US
mit.licensePUBLISHER_CC
mit.metadata.statusAuthority Work and Publication Information Neededen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record