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@ARTICLE{Nusser:14021,
author = {Nusser, K. and Neueder, S. and Schneider, G.J. and Meyer,
M. and Pyckhout-Hintzen, W. and Willner, L. and Radulescu,
A. and Richter, D.},
title = {{C}onformations of silica-poly(ethylene-propylene)
nanocomposites},
journal = {Macromolecules},
volume = {43},
issn = {0024-9297},
address = {Washington, DC},
publisher = {Soc.},
reportid = {PreJuSER-14021},
pages = {9837 - 9847},
year = {2010},
note = {K.N. gratefully acknowledges the financial support of the
Evonik Stiftung.},
abstract = {By the use of small angle neutron scattering, the chain
conformation in a polymer nanocomposite was studied as a
function of the nanoparticle fraction for two different
molecular weights. A repulsive system was realized in mixing
poly(ethylene-propylene) and hydrophobically modified
silica. All nanocomposite SANS data exhibit a pronounced
scattering peak at intermediate momentum transfers, which is
closely connected with the particle structure. Even under
contrast matching conditions, the hydrophobic surface layer
of the nanoparticles was found to contribute significantly
to the scattering signal. In particular, in the short chain
matrix the peak origin is exclusively related to direct
particle scattering. In the long chain matrix, an additional
peak contribution is present. Possible origins include void
correlation scattering or polymer correlation scattering. We
show unambiguously that the conformation of short chains
with a molecular weight of 3000 g/mol is not visibly
disturbed by the presence of the nanoparticles. In contrast
to that a polymer matrix with 50 000 g/mol chains is
affected by the particle presence. The chain radius of
gyration R-g decreases.},
keywords = {J (WoSType)},
cin = {IFF-4 / IFF-5 / Jülich Centre for Neutron Science JCNS
(JCNS) ; JCNS},
ddc = {540},
cid = {I:(DE-Juel1)VDB784 / I:(DE-Juel1)VDB785 /
I:(DE-Juel1)JCNS-20121112},
pnm = {BioSoft: Makromolekulare Systeme und biologische
Informationsverarbeitung / Großgeräte für die Forschung
mit Photonen, Neutronen und Ionen (PNI)},
pid = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
shelfmark = {Polymer Science},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000284967000033},
doi = {10.1021/ma101898c},
url = {https://juser.fz-juelich.de/record/14021},
}