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dc.contributor.author
Katsarou, Anna F.
dc.contributor.author
Tsamopoulos, Alexandros J.
dc.contributor.author
Tsalikis, Dimitrios G.
dc.contributor.author
Mavrantzas, Vlasis G.
dc.date.accessioned
2020-06-10T13:12:30Z
dc.date.available
2020-06-10T02:21:11Z
dc.date.available
2020-06-10T13:12:30Z
dc.date.issued
2020-03-30
dc.identifier.issn
2073-4360
dc.identifier.other
10.3390/polym12040752
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/419343
dc.identifier.doi
10.3929/ethz-b-000419343
dc.description.abstract
We present results from a direct statistical analysis of long molecular dynamics (MD) trajectories for the orientational relaxation of individual ring molecules in blends with equivalent linear chains. Our analysis reveals a very broad distribution of ring relaxation times whose width increases with increasing ring/linear molecular length and increasing concentration of the blend in linear chains. Dynamic heterogeneity is also observed in the pure ring melts but to a lesser extent. The enhanced degree of dynamic heterogeneity in the blends arises from the substantial increase in the intrinsic timescales of a large subpopulation of ring molecules due to their involvement in strong threading events with a certain population of the linear chains present in the blend. Our analysis suggests that the relaxation dynamics of the rings are controlled by the different states of their threading by linear chains. Unthreaded or singly-threaded rings exhibit terminal relaxation very similar to that in their own melt, but multiply-threaded rings relax much slower due to the long lifetimes of the corresponding topological interactions. By further analyzing the MD data for ring molecule terminal relaxation in terms of the sum of simple exponential functions we have been able to quantify the characteristic relaxation times of the corresponding mechanisms contributing to ring relaxation both in their pure melts and in the blends, and their relative importance. The extra contribution due to ring-linear threadings in the blends becomes immediately apparent through such an analysis.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
MDPI
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
dynamic heterogeneity
en_US
dc.subject
rings
en_US
dc.subject
threading events
en_US
dc.title
Dynamic Heterogeneity in Ring-Linear Polymer Blends
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Polymers
ethz.journal.volume
12
en_US
ethz.journal.issue
4
en_US
ethz.journal.abbreviated
Polymers (Basel)
ethz.pages.start
752
en_US
ethz.size
15 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Basel
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::03510 - Pratsinis, Sotiris E. / Pratsinis, Sotiris E.
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::03510 - Pratsinis, Sotiris E. / Pratsinis, Sotiris E.
ethz.date.deposited
2020-06-10T02:21:15Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-06-10T13:12:40Z
ethz.rosetta.lastUpdated
2021-02-15T14:30:51Z
ethz.rosetta.versionExported
true
ethz.COinS
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