001055098 001__ 1055098
001055098 005__ 20260227202312.0
001055098 037__ $$aFZJ-2026-01855
001055098 1001_ $$aRichter, D.$$b0
001055098 1112_ $$aSynergies in HIgh RESolution Spectroscopy$$cILL4, Grenoble$$d2026-03-10 - 2026-03-13$$gHIRES 2026$$wFrance
001055098 245__ $$aDynamics of Polymer Rings in Ring-Linear Blends combining Rheology and Neutron Spin Echo Spectroscopy
001055098 260__ $$c2026
001055098 3367_ $$033$$2EndNote$$aConference Paper
001055098 3367_ $$2DataCite$$aOther
001055098 3367_ $$2BibTeX$$aINPROCEEDINGS
001055098 3367_ $$2DRIVER$$aconferenceObject
001055098 3367_ $$2ORCID$$aLECTURE_SPEECH
001055098 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1772181297_32052$$xInvited
001055098 520__ $$aWe have investigated the dynamics of polyethylene-oxide (PEO) ring/linear blends of various molecular weight ratios. Both the blend viscosity as well as the microscopic dynamics were studied. The blend viscosity displays a maximum at intermediate ring volume fractions. For symmetric blends the relative viscosity maximum increases with the molecular weight of the polymers, while for asymmetric blends the viscosity maximum gets stronger, if the linear constituent becomes smaller than the ring. Applying neutron spin echo (NSE) spectroscopy on samples containing a fraction of labelled rings, we essentially observed the internal ring dynamics and its modifications as function of ring volume fraction ϕ_R. We observe an increased enslavement of the ring dynamics with higher host Mw. While this holds for all hosts above 10K, linear chains exhibiting only five entanglements are not able to impress its dynamics on the rings. In symmetric ring linear blends increasing ring enslavement well correlates with the increase of the viscosity enhancement observed. For asymmetric blends increasing host Mw in all cases leads to stronger enslavement. The observed increase of the viscosity found for shorter hosts does not find any parallel in the microscopic dynamics. Blends. At ϕ_R=0.5 the spectral shapes are still local reptation type, however, the decrease of constraints compared to the neat linear melts is more pronounced for the shorter host. The results qualitatively agree with available simulations validating them.
001055098 536__ $$0G:(DE-HGF)POF4-632$$a632 - Materials – Quantum, Complex and Functional Materials (POF4-632)$$cPOF4-632$$fPOF IV$$x0
001055098 536__ $$0G:(DE-HGF)POF4-6G4$$a6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4)$$cPOF4-6G4$$fPOF IV$$x1
001055098 7001_ $$aVLASSOPOULOS, D.$$b1
001055098 7001_ $$0P:(DE-HGF)0$$aHOFFMANN, I.$$b2
001055098 7001_ $$aALLGAIER, J.$$b3
001055098 7001_ $$aPEPONAKI, K.$$b4
001055098 7001_ $$aKRUTEVA, M.$$b5
001055098 7001_ $$aMONKENBUSCH, M.$$b6
001055098 909CO $$ooai:juser.fz-juelich.de:1055098$$pVDB
001055098 9131_ $$0G:(DE-HGF)POF4-632$$1G:(DE-HGF)POF4-630$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vMaterials – Quantum, Complex and Functional Materials$$x0
001055098 9131_ $$0G:(DE-HGF)POF4-6G4$$1G:(DE-HGF)POF4-6G0$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lGroßgeräte: Materie$$vJülich Centre for Neutron Research (JCNS) (FZJ)$$x1
001055098 9141_ $$y2026
001055098 9201_ $$0I:(DE-Juel1)JCNS-2-20110106$$kJCNS-2$$lStreumethoden$$x0
001055098 9201_ $$0I:(DE-82)080009_20140620$$kJARA-FIT$$lJARA-FIT$$x1
001055098 9201_ $$0I:(DE-Juel1)JCNS-1-20110106$$kJCNS-1$$lNeutronenstreuung$$x2
001055098 980__ $$aconf
001055098 980__ $$aVDB
001055098 980__ $$aI:(DE-Juel1)JCNS-2-20110106
001055098 980__ $$aI:(DE-82)080009_20140620
001055098 980__ $$aI:(DE-Juel1)JCNS-1-20110106
001055098 980__ $$aUNRESTRICTED