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@ARTICLE{Riemer:825958,
author = {Riemer, Sven and Prévost, Sylvain and Dzionara, Michaela
and Appavou, Marie-Sousai and Schweins, Ralf and
Gradzielski, Michael},
title = {{A}ggregation behaviour of hydrophobically modified
polyacrylate – {V}ariation of alkyl chain length},
journal = {Polymer},
volume = {70},
issn = {0032-3861},
address = {Oxford},
publisher = {Elsevier Science},
reportid = {FZJ-2017-00230},
pages = {194 - 206},
year = {2015},
abstract = {The aggregation behaviour in aqueous solution of
hydrophobically modified polyacrylates, synthesized by
Atomic Transfer Radical Copolymerisation (ATRP) of mixtures
of alkyl acrylate and t-butyl acrylate and subsequent
hydrolysis of the t-butyl acrylate, was investigated by a
combination of static and dynamic light scattering with
small-angle neutron scattering (SANS). The degree of
amphiphilicity was varied by the percentage of alkyl chains
and the length of the alkyl chain (butyl to dodecyl), and,
in addition, depends strongly on pH via the ionization of
the polyacrylate backbone. SANS shows the formation of
hydrophobic domains whose size scales with the length of the
alkyl chain. The tendency for domain formation increases
with the length of the alkyl chains and is much more
pronounced for lower pH, while at high pH the electrostatic
charging suppresses the formation of hydrophobic domains for
chains shorter than octyl. Then only relatively large and
loosely connected aggregates are formed. These
hydrophobically modified copolymers show a pronouncedly pH
dependent aggregation behaviour that is controlled by the
length and percentage of hydrophobic modification and this
widely tuneable aggregation behaviour could be interesting
for the transport and controlled release of hydrophobic
cargo molecules.},
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 = {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:000358005000022},
doi = {10.1016/j.polymer.2015.06.010},
url = {https://juser.fz-juelich.de/record/825958},
}