This title appears in the Scientific Report :
2003
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevLett.90.058302 in citations.
Please use the identifier: http://hdl.handle.net/2128/1280 in citations.
Direct observation of the transition from free to constrained single-segment motion in entangled polymer melts
Direct observation of the transition from free to constrained single-segment motion in entangled polymer melts
We report a direct determination of the time dependent mean-squared segment displacement of a polymer chain in the melt covering the transition from free to constraint Rouse relaxation along the virtual tube of the reptation model. This has been achieved by a neutron spin-echo (NSE) measurement of t...
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Personal Name(s): | Wischnewski, A. |
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Monkenbusch, M. / Willner, L. / Richter, D. / Kali, G. | |
Contributing Institute: |
Neutronenstreuung; IFF-NST |
Published in: | Physical review letters, 90 (2003) S. 058302 |
Imprint: |
College Park, Md.
APS
2003
|
Physical Description: |
058302 |
DOI: |
10.1103/PhysRevLett.90.058302 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Physical Review Letters
90 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1280 in citations.
We report a direct determination of the time dependent mean-squared segment displacement of a polymer chain in the melt covering the transition from free to constraint Rouse relaxation along the virtual tube of the reptation model. This has been achieved by a neutron spin-echo (NSE) measurement of the segmental self-correlation function as conveyed by the spin-incoherent scattering from two fully protonated polymer melts, polyethylene and polyethylene propylene. Within the scenario of de Gennes reptation model a transition of the time dependence of segmental mean-squared displacements from proportional tot(1/2) to proportional tot(1/4) is expected and clearly corroborated by the incoherent NSE results. |