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@ARTICLE{MalodeMolina:278935,
author = {Malo de Molina, Paula and Ihlefeldt, Franziska Stefanie and
Prévost, Sylvain and Herfurth, Christoph and Appavou,
Marie-Sousai and Laschewsky, André and Gradzielski,
Michael},
title = {{P}hase {B}ehavior of {N}onionic {M}icroemulsions with
{M}ulti-end-capped {P}olymers and {I}ts {R}elation to the
{M}esoscopic {S}tructure},
journal = {Langmuir},
volume = {31},
number = {18},
issn = {1520-5827},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {FZJ-2015-07110},
pages = {5198 - 5209},
year = {2015},
note = {"final draft post referee" kann nicht beigebracht werden},
abstract = {The polymer architecture of telechelic or associative
polymers has a large impact on the bridging of
self-assembled structures. This work presents the phase
behavior, small angle neutron scattering (SANS), dynamic
light scattering (DLS), and fluorescence correlation
spectroscopy (FCS) of a nonionic oil-in-water (O/W)
microemulsion with hydrophobically end-capped multiarm
polymers with functionalities f = 2, 3, and 4. For high
polymer concentrations and large average interdroplet
distance relative to the end-to-end distance of the polymer,
d/Ree, the system phase separates into a dense, highly
connected droplet network phase, in equilibrium with a
dilute phase. The extent of the two-phase region is larger
for polymers with similar length but higher f. The
interaction potential between the droplets in the presence
of polymer has both a repulsive and an attractive
contribution as a result of the counterbalancing effects of
the exclusion by polymer chains and bridging between
droplets. This study experimentally demonstrates that higher
polymer functionalities induce a stronger attractive force
between droplets, which is responsible for a more extended
phase separation region, and correlate with lower collective
droplet diffusivities and higher amplitude of the second
relaxation time in DLS. The viscosity and the droplet
self-diffusion obtained from FCS, however, are dominated by
the end-capped chain concentration.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {670},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000354578700023},
doi = {10.1021/acs.langmuir.5b00817},
url = {https://juser.fz-juelich.de/record/278935},
}