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@ARTICLE{Glomann:137614,
author = {Glomann, Thomas and Hamm, Adrian and Allgaier, Jürgen and
Hübner, Eike G. and Radulescu, Aurel and Farago, Bela and
Schneider, Gerald Johannes},
title = {{A} microscopic view on the large scale chain dynamics in
nanocomposites with attractive interactions},
journal = {Soft matter},
volume = {44},
number = {9},
issn = {1744-6848},
address = {Cambridge},
publisher = {Royal Society of Chemistry (RSC)},
reportid = {FZJ-2013-03994},
pages = {10559-10571},
year = {2013},
note = {Creative Commons Licence CCBYNC},
abstract = {We use neutron spin-echo spectroscopy to investigate the
large scale chain dynamics in unentangled polymer
nanocomposites where stable polymer layers around
nanoparticles are dynamically formed due to attractive
segment–surface interactions. The work here focuses on the
detailed microscopic characterization of the dynamics within
these layers of bound poly(ethylene glycol) (PEO) and
poly(butylene oxide) (PBO) chains at a fixed silica
nanoparticle fraction of $15\%.$ The substitution of hydroxy
by methoxy terminated chains thereby clearly evidences the
importance of the chain end chemistry in these systems as
the layer structure and dynamics therein significantly
depend on the specific interaction mechanism. The
experimental data reveal a densely packed thick shell of
end-attached chains in the case of hydroxy ends contrasted
by a thin shell of laterally adsorbed chains with multiple
attachments in the methoxy case. In all cases a consistent
quantitative modeling is presented that evidences unchanged
segmental dynamics within the bound layers. The obtained
picture is further validated on an independent model system
based on PBO polymers which shows surprisingly similar chain
dynamics as for PEG in the nanocomposite pointing to a very
generic dynamic scenario.},
cin = {JCNS-1 / JCNS (München) ; Jülich Centre for Neutron
Science JCNS (München) ; JCNS-FRM-II / ICS-1},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)ICS-1-20110106},
pnm = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
(POF2-54G24)},
pid = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
experiment = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000326287700014},
doi = {10.1039/c3sm51194d},
url = {https://juser.fz-juelich.de/record/137614},
}