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@ARTICLE{Jaksch:171841,
author = {Jaksch, Sebastian and Schulz, Anita and Kyriakos,
Konstantinos and Zhang, Jianqi and Grillo, Isabelle and
Pipich, Vitaliy and Jordan, Rainer and Papadakis, Christine
M.},
title = {{T}he collapse and aggregation of thermoresponsive
poly(2-oxazoline) gradient copolymers: a time-resolved
{SANS} study},
journal = {Colloid $\&$ polymer science},
volume = {292},
number = {10},
issn = {0023-2904},
address = {Berlin},
publisher = {Springer},
reportid = {FZJ-2014-05398},
pages = {2413 - 2425},
year = {2014},
abstract = {We have investigated the collapse transition of aqueous
solutions of gradient copolymers from
poly(iso-propyl-2-oxazoline)s (PiPrOx), which contain few
hydrophobic moieties (n-nonyl-2-oxazoline (NOx) monomers).
We extend our previous investigations (Salzinger et al.,
Colloid Polym Sci 290:385–400, 2012), where, for the
gradient copolymers, an intermediate regime right above the
cloud point was identified where small aggregates are
predominant. Large aggregates are present in significant
numbers only at higher temperatures. To investigate the
stability of the intermediate regime, we performed
time-resolved small-angle neutron scattering (SANS)
experiments during temperature jumps starting below the
cloud point and ending in the intermediate regime or in the
high-temperature regime. We found that the intermediate
regime is stable during the time investigated (∼1 h).
Moreover, the collapse of the small aggregates and the
surface structure of the large aggregates are related to the
number of hydrophobic moieties and the quench depth. The
present results elucidate the structural evolution of these
polymers and relate them to their final state as well as to
their macroscopic behavior.},
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 = {54G - JCNS (POF2-54G24)},
pid = {G:(DE-HGF)POF2-54G24},
experiment = {EXP:(DE-MLZ)KWS3-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000342172300002},
doi = {10.1007/s00396-014-3333-6},
url = {https://juser.fz-juelich.de/record/171841},
}