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@ARTICLE{Kang:878315,
author = {Kang, Jia-Jhen and Shehu, Kaltrina and Sachse, Clemens and
Jung, Florian A. and Ko, Chia-Hsin and Barnsley, Lester C.
and Jordan, Rainer and Papadakis, Christine M.},
title = {{A} molecular brush with thermoresponsive
poly(2-ethyl-2-oxazoline) side chains: a structural
investigation},
journal = {Colloid $\&$ polymer science},
volume = {299},
issn = {1435-1536},
address = {Heidelberg},
publisher = {Springer},
reportid = {FZJ-2020-02772},
pages = {193–203},
year = {2021},
abstract = {The thermoresponsive behavior of a poly(2-oxazoline)-based
molecular brush is investigated in aqueous solution. The
molecular brush under study, PiPOx100-g-PEtOx17, has a
poly(2-isopropenyl-2-oxazoline) (PiPOx) backbone grafted
with thermoresponsive poly(2-ethyl-2-oxazoline) (PEtOx) side
chains. Since the backbone degree of polymerization is only
a factor of ~ 6 higher than the ones of the side chains,
it features an architecture between a star-like polymer and
a comb-like polymer. Its aqueous solution exhibits lower
critical solution temperature (LCST) behavior with a cloud
point temperature Tcp = 40.5 °C at 30 g L−1. The
temperature-dependent structural evolution is disclosed
using dynamic light scattering (DLS) and small-angle neutron
scattering (SANS). An increase of the molecular brush size
is found upon heating from room temperature to Tcp, which is
attributed to the extension of the backbone resulting from
the dehydration and collapse of the side chains. Above Tcp,
the size decreases again, which indicates the collapse of
the whole molecular brush. Large aggregates are found to be
present in the solution in the temperature range 25–50
°C. These become more compact, as the temperature is
increased across Tcp.},
cin = {JCNS-FRM-II / JCNS-2 / MLZ},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106 / I:(DE-588b)4597118-3},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000556215600001},
doi = {10.1007/s00396-020-04704-6},
url = {https://juser.fz-juelich.de/record/878315},
}