This title appears in the Scientific Report :
2011
Please use the identifier:
http://hdl.handle.net/2128/7339 in citations.
Please use the identifier: http://dx.doi.org/10.1039/C1SM06257C in citations.
Structure and Dynamics of Polymer Rings by Neutron Scattering: Breakdown of the Rouse Model
Structure and Dynamics of Polymer Rings by Neutron Scattering: Breakdown of the Rouse Model
We present a static and quasi-elastic neutron scattering study on both the structure and dynamics of a ring polymer in a ring and linear polymer melt, respectively. In the first case, the ring structure proved to be significantly more compact compared to the linear chain with the same molecular weig...
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Personal Name(s): | Bras, A.R. |
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Pasquino, R. / Koukoulas, T. / Tsolou, G. / Holderer, O. / Radulescu, A. / Allgaier, J. / Mavrantzas, V. / Pykchout-Hintzen, W. / Wischnewski, A. / Vlassopoulos, D. | |
Contributing Institute: |
Neutronenstreuung; ICS-1 Neutronenstreuung; JCNS-1 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Soft matter, 7 (2011) S. 11169 - 11176 |
Imprint: |
Cambridge
Royal Society of Chemistry (RSC)
2011
|
Physical Description: |
11169 - 11176 |
DOI: |
10.1039/C1SM06257C |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung |
Series Title: |
Soft Matter
7 |
Subject (ZB): | |
Link: |
Get full text Published under German "Allianz" Licensing conditions on 2011-10-13. Available in OpenAccess from 2012-10-13 |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1039/C1SM06257C in citations.
We present a static and quasi-elastic neutron scattering study on both the structure and dynamics of a ring polymer in a ring and linear polymer melt, respectively. In the first case, the ring structure proved to be significantly more compact compared to the linear chain with the same molecular weight. In the mixture, the ring molecules swell as was confirmed by small angle neutron scattering ( SANS) in accordance with both theory and simulation work. The dynamical behavior of both systems, which for the first time has been explored by neutron spin echo spectroscopy (NSE), shows a surprisingly fast center of mass diffusion as compared to the linear polymer. These results agree qualitatively with the presented atomistic MD simulations. The fast diffusion turned out to be an explicit violation of the Rouse model. |