This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevLett.113.168302 in citations.
Please use the identifier: http://hdl.handle.net/2128/8025 in citations.
Molecular Scale Dynamics of Large Ring Polymers
Molecular Scale Dynamics of Large Ring Polymers
We present neutron scattering data on the structure and dynamics of melts from polyethylene oxide rings with molecular weights up to ten times the entanglement mass of the linear counterpart. The data reveal a very compact conformation displaying a structure approaching a mass fractal, as hypothesiz...
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Personal Name(s): | Goossen, Sebastian (Corresponding Author) |
---|---|
Bras, Ana / Krutyeva, M. / Sharp, M. / Falus, P. / Feoktystov, A. / Gasser, U. / Pyckhout-Hintzen, W. / Wischnewski, A. / Richter, D. | |
Contributing Institute: |
Neutronenstreuung; ICS-1 Neutronenstreuung; JCNS-1 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical review letters, 113 (2014) 16, S. 168302 |
Imprint: |
College Park, Md.
APS
2014
|
DOI: |
10.1103/PhysRevLett.113.168302 |
Document Type: |
Journal Article |
Research Program: |
JCNS Soft Matter Composites |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/8025 in citations.
We present neutron scattering data on the structure and dynamics of melts from polyethylene oxide rings with molecular weights up to ten times the entanglement mass of the linear counterpart. The data reveal a very compact conformation displaying a structure approaching a mass fractal, as hypothesized by recent simulation work. The dynamics is characterized by a fast Rouse relaxation of subunits (loops) and a slower dynamics displaying a lattice animal-like loop displacement. The loop size is an intrinsic property of the ring architecture and is independent of molecular weight. This is the first experimental observation of the space-time evolution of segmental motion in ring polymers illustrating the dynamic consequences of their topology that is unique among all polymeric systems of any other known architecture. |