Hauptseite > Publikationsdatenbank > Dynamics of Polymer Rings in Ring-Linear Blends combining Rheology and Neutron Spin Echo Spectroscopy > print

001     1055098
005     20260227202312.0
037 _ _ |a FZJ-2026-01855
100 1 _ |a Richter, D.
|b 0
111 2 _ |a Synergies in HIgh RESolution Spectroscopy
|g HIRES 2026
|c ILL4, Grenoble
|d 2026-03-10 - 2026-03-13
|w France
245 _ _ |a Dynamics of Polymer Rings in Ring-Linear Blends combining Rheology and Neutron Spin Echo Spectroscopy
260 _ _ |c 2026
336 7 _ |a Conference Paper
|0 33
|2 EndNote
336 7 _ |a Other
|2 DataCite
336 7 _ |a INPROCEEDINGS
|2 BibTeX
336 7 _ |a conferenceObject
|2 DRIVER
336 7 _ |a LECTURE_SPEECH
|2 ORCID
336 7 _ |a Conference Presentation
|b conf
|m conf
|0 PUB:(DE-HGF)6
|s 1772181297_32052
|2 PUB:(DE-HGF)
|x Invited
520 _ _ |a We have investigated the dynamics of polyethylene-oxide (PEO) ring/linear blends of various molecular weight ratios. Both the blend viscosity as well as the microscopic dynamics were studied. The blend viscosity displays a maximum at intermediate ring volume fractions. For symmetric blends the relative viscosity maximum increases with the molecular weight of the polymers, while for asymmetric blends the viscosity maximum gets stronger, if the linear constituent becomes smaller than the ring. Applying neutron spin echo (NSE) spectroscopy on samples containing a fraction of labelled rings, we essentially observed the internal ring dynamics and its modifications as function of ring volume fraction ϕ_R. We observe an increased enslavement of the ring dynamics with higher host Mw. While this holds for all hosts above 10K, linear chains exhibiting only five entanglements are not able to impress its dynamics on the rings. In symmetric ring linear blends increasing ring enslavement well correlates with the increase of the viscosity enhancement observed. For asymmetric blends increasing host Mw in all cases leads to stronger enslavement. The observed increase of the viscosity found for shorter hosts does not find any parallel in the microscopic dynamics. Blends. At ϕ_R=0.5 the spectral shapes are still local reptation type, however, the decrease of constraints compared to the neat linear melts is more pronounced for the shorter host. The results qualitatively agree with available simulations validating them.
536 _ _ |a 632 - Materials – Quantum, Complex and Functional Materials (POF4-632)
|0 G:(DE-HGF)POF4-632
|c POF4-632
|f POF IV
|x 0
536 _ _ |a 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4)
|0 G:(DE-HGF)POF4-6G4
|c POF4-6G4
|f POF IV
|x 1
700 1 _ |a VLASSOPOULOS, D.
|b 1
700 1 _ |a HOFFMANN, I.
|0 P:(DE-HGF)0
|b 2
700 1 _ |a ALLGAIER, J.
|b 3
700 1 _ |a PEPONAKI, K.
|b 4
700 1 _ |a KRUTEVA, M.
|b 5
700 1 _ |a MONKENBUSCH, M.
|b 6
909 C O |o oai:juser.fz-juelich.de:1055098
|p VDB
913 1 _ |a DE-HGF
|b Forschungsbereich Materie
|l Von Materie zu Materialien und Leben
|1 G:(DE-HGF)POF4-630
|0 G:(DE-HGF)POF4-632
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|2 G:(DE-HGF)POF4-600
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|v Materials – Quantum, Complex and Functional Materials
|x 0
913 1 _ |a DE-HGF
|b Forschungsbereich Materie
|l Großgeräte: Materie
|1 G:(DE-HGF)POF4-6G0
|0 G:(DE-HGF)POF4-6G4
|3 G:(DE-HGF)POF4
|2 G:(DE-HGF)POF4-600
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|v Jülich Centre for Neutron Research (JCNS) (FZJ)
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914 1 _ |y 2026
920 1 _ |0 I:(DE-Juel1)JCNS-2-20110106
|k JCNS-2
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920 1 _ |0 I:(DE-82)080009_20140620
|k JARA-FIT
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|x 1
920 1 _ |0 I:(DE-Juel1)JCNS-1-20110106
|k JCNS-1
|l Neutronenstreuung
|x 2
980 _ _ |a conf
980 _ _ |a VDB
980 _ _ |a I:(DE-Juel1)JCNS-2-20110106
980 _ _ |a I:(DE-82)080009_20140620
980 _ _ |a I:(DE-Juel1)JCNS-1-20110106
980 _ _ |a UNRESTRICTED

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