Show simple item record

dc.contributor.author
Noh, Jinkyung
dc.contributor.author
Koo, Mo Beom
dc.contributor.author
Jung, Jisoo
dc.contributor.author
Peterson, Gregory I.
dc.contributor.author
Kim, Kyoung Taek
dc.contributor.author
Choi, Tae Lim
dc.date.accessioned
2023-09-07T13:30:55Z
dc.date.available
2023-08-07T03:47:38Z
dc.date.available
2023-08-10T09:59:50Z
dc.date.available
2023-09-07T13:30:55Z
dc.date.issued
2023-08-23
dc.identifier.issn
0002-7863
dc.identifier.issn
1520-5126
dc.identifier.other
10.1021/jacs.3c04733
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/625526
dc.description.abstract
A series of monodisperse cyclic and linear poly(d,l-lactide)s (c-PLA and l-PLA, respectively) were prepared with various degrees of polymerization (DP) using an iterative convergent synthesis approach. The absence of a molecular weight distribution provided us a chance to study their mechanochemical reactivity without obstructions arising from the size distribution. Additionally, we prepared l- and c-PLAs with identical DPs, which enabled us to attribute differences in scission rates to the cyclic polymer architecture alone. The polymers were subjected to ultrasonication (US) and ball-mill grinding (BMG), and their degradation kinetics were explored. Up to 9.0 times larger scission rates were observed for l-PLA (compared to c-PLA) with US, but the difference was less than 1.9 times with BMG. Fragmentation requires two backbone scission events for c-PLA, and we were able to observe linear intermediates (formed after a single scission) for the first time. We also developed a new method of studying the dynamic memory effect in US by characterizing and comparing the daughter fragment molecular weight distributions of l- and c-PLAs. These results provide new insights into the influence of the cyclic polymer architecture on mechanochemical reactions as well as differences in reactivity observed with US and BMG.
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.subject
Circuits
en_US
dc.subject
Degradation
en_US
dc.subject
Kinetic parameters
en_US
dc.subject
Physical and chemical properties
en_US
dc.subject
Polymers
en_US
dc.title
Monodisperse Cyclic Polymer Mechanochemistry: Scission Kinetics and the Dynamic Memory Effect with Ultrasonication and Ball-Mill Grinding
en_US
dc.type
Journal Article
dc.date.published
2023-07-24
ethz.journal.title
Journal of the American Chemical Society
ethz.journal.volume
145
en_US
ethz.journal.issue
33
en_US
ethz.journal.abbreviated
J. Am. Chem. Soc.
ethz.pages.start
18432
en_US
ethz.pages.end
18438
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::02646 - Institut für Polymere / Institute of Polymers::09767 - Choi, Tae-Lim / Choi, Tae-Lim
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::02646 - Institut für Polymere / Institute of Polymers::09767 - Choi, Tae-Lim / Choi, Tae-Lim
ethz.date.deposited
2023-08-07T03:47:53Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2023-09-07T13:30:56Z
ethz.rosetta.lastUpdated
2024-02-03T03:23:52Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Monodisperse%20Cyclic%20Polymer%20Mechanochemistry:%20Scission%20Kinetics%20and%20the%20Dynamic%20Memory%20Effect%20with%20Ultrasonication%20and%20Ball-Mill%20Grinding&rft.jtitle=Journal%20of%20the%20American%20Chemical%20Society&rft.date=2023-08-23&rft.volume=145&rft.issue=33&rft.spage=18432&rft.epage=18438&rft.issn=0002-7863&1520-5126&rft.au=Noh,%20Jinkyung&Koo,%20Mo%20Beom&Jung,%20Jisoo&Peterson,%20Gregory%20I.&Kim,%20Kyoung%20Taek&rft.genre=article&rft_id=info:doi/10.1021/jacs.3c04733&
 Search print copy at ETH Library

Files in this item

FilesSizeFormatOpen in viewer

There are no files associated with this item.

Publication type

Show simple item record