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@ARTICLE{Dyakonova:888174,
author = {Dyakonova, Margarita A. and Li, Yanan and Besiri, Ioanna N.
and Di, Zhenyu and Grillo, Isabelle and Tsitsilianis,
Constantinos and Papadakis, Christine M.},
title = {{E}ffect of cosolvent on the rheological properties and
self-assembled structures from telechelic polyampholytes},
journal = {Colloid $\&$ polymer science},
volume = {299},
issn = {1435-1536},
address = {Heidelberg},
publisher = {Springer},
reportid = {FZJ-2020-04737},
pages = {419–428},
year = {2021},
abstract = {A triblock copolymer with hydrophobic end blocks and a
polyampholytic middle block is investigated in a mixture of
water and acetone with a focus on the dependence of the
rheological properties and of the micellar structure and
correlation on the content of acetone. The polymer under
study is PMMA86-b-P(DEA190-co-MAA96)-b-PMMA86, where PMMA
stands for poly(methyl methacrylate) and P(DEA-co-MAA) for
poly(2-(diethylamino) ethyl methacrylate-co-methacrylic
acid). The pH is chosen at 3. Rheological measurements
reveal a transition from a viscoelastic solid over a
viscoelastic liquid to a freely flowing liquid upon addition
of 5 or 10 $wt\%$ of acetone to a 3 $wt\%$ aqueous polymer
solution, respectively. Using small-angle neutron scattering
on 0.5 $wt\%$ polymer solutions in water/acetone with the
content of the latter ranging between 0 and 30 $wt\%,$
significant structural changes are observed as well, such as
a decrease of the distance between the PMMA cross-links and
of the size of the network clusters upon increasing acetone
constant. These changes are attributed to the reduction of
the dielectric constant by the addition of the cosolvent
acetone, enhancing the flexibility of the middle blocks and
their tendency to backfolding, as well as to the decrease of
the solvent selectivity, inducing significant exchange rate
enhancement of the core-forming PMMA blocks.},
cin = {JCNS-FRM-II / JCNS-1 / MLZ},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / 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:000578405100001},
doi = {10.1007/s00396-020-04758-6},
url = {https://juser.fz-juelich.de/record/888174},
}