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@ARTICLE{Arbe:818387,
author = {Arbe, Arantxa and Moreno, Angel J. and Allgaier, J. and
Ivanova, Oxana and Fouquet, Peter and Colmenero, Juan and
Richter, Dieter},
title = {{R}ole of {D}ynamic {A}symmetry on the {C}ollective
{D}ynamics of {C}omblike {P}olymers: {I}nsights from
{N}eutron {S}pin-{E}cho {E}xperiments and {C}oarse-{G}rained
{M}olecular {D}ynamics {S}imulations},
journal = {Macromolecules},
volume = {49},
number = {13},
issn = {1520-5835},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2016-04848},
pages = {4989 - 5000},
year = {2016},
abstract = {We investigate the collective dynamics of comblike polymers
displaying nanosegregation in side groups and main-chain
rich domains, where side groups and backbones are
dynamically equivalent. Neutron spin-echo experiments on
poly(alkylene oxide)s with increasing side-group length have
been focused on the decay of inter- and intradomain
correlations and are complemented with molecular dynamics
simulations on a coarse-grained model. In general, a good
qualitative agreement between simulation and experiment is
found. The collective times at inter- and intradomain levels
converge with decreasing temperature, implying a common
glass transition, and separate at high temperatures,
revealing an increasing role of connectivity. The features
of collective relaxations—regarding stretching,
characteristic time, and temperature dependence—are
independent of branching. The standard stretching for
side-group motions and the closeness of collective and
self-motions show that the anomalies exhibited by
dynamically asymmetric comblike macromolecules disappear.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)J-NSE-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000379704000032},
doi = {10.1021/acs.macromol.6b00931},
url = {https://juser.fz-juelich.de/record/818387},
}