TY  - JOUR
AU  - Zamponi, M.
AU  - Pyckhout-Hintzen, W.
AU  - Wischnewski, A.
AU  - Monkenbusch, M.
AU  - Willner, L.
AU  - Kali, G.
AU  - Richter, D.
TI  - Molecular observation of branch point motion in star polymer melts
JO  - Macromolecules
VL  - 43
IS  - 1
SN  - 0024-9297
CY  - Washington, DC
PB  - Soc.
M1  - PreJuSER-7863
SP  - 518 - 524
PY  - 2010
N1  - Record converted from VDB: 12.11.2012
AB  - Using neutron spin echo (NSE) spectroscopy and a labeling scheme unique to neutron scattering the motion of it labeled branch point of a three-arm polyethylene star has been observed oil a molecular level. The measured dynamic structure factor shows a clear transition to a Plateau, Signifying the stronger confinement of the star center in comparison to a corresponding center labeled linear chain. A shortening of one star arm to about only one entanglement length leads to the same topological confinement as for the symmetric star within the accessible time range of NSE. This reflects it stronger effect of such it small branch than expected and is consistent with rheological measurements on the same system.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000273268700069
DO  - DOI:10.1021/ma9017185
UR  - https://juser.fz-juelich.de/record/7863
ER  -