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@ARTICLE{Nusser:137396,
author = {Nusser, Klaus and Schneider, Gerald Johannes and Richter,
Dieter},
title = {{R}heology and {A}nomalous {F}low {P}roperties of
{P}oly(ethylene- alt -propylene)–{S}ilica
{N}anocomposites},
journal = {Macromolecules},
volume = {46},
number = {15},
issn = {1520-5835},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2013-03843},
pages = {6263 - 6272},
year = {2013},
abstract = {In this work, poly(ethylene-alt-propylene)–silica
nanocomposites, constituting a model nanocomposite system
with mostly nonattractive interactions, are studied by means
of oscillatory shear rheology. Two different molecular
weights were used in order to consider both the effect of
nanoparticle presence on the relaxation of short as well as
long polymer matrices. An increase of the particle fraction
leads on the one hand to the observation of typical
characteristics of colloidal rheology such as mechanical
reinforcement and the formation of a particle gel. On the
other hand and in the focus of our analysis, the increasing
particle presence also directly affects the relaxation of
the polymer chains. In particular, a shift of the polymer
loss maximum in G″(ω) is found in the entangled matrices,
whereas anomalous flow behavior is evidenced in the rheology
data of highly filled short matrices. We succeeded to
explain these macroscopic observations from the rheology
experiments by considering small-angle neutron scattering
and neutron spin echo results on the same samples, which
yield detailed insight into the molecular circumstances
responsible for the observed macroscopic property changes.},
cin = {Neutronenstreuung ; JCNS-1 / JCNS (München) ; Jülich
Centre for Neutron Science JCNS (München) ; JCNS-FRM-II /
ICS-1},
ddc = {540},
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)},
pid = {G:(DE-HGF)POF2-451},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000323193300051},
doi = {10.1021/ma3025927},
url = {https://juser.fz-juelich.de/record/137396},
}