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@ARTICLE{MeierKoll:201060,
author = {Meier-Koll, Andreas and Pipich, Vitaliy and Busch, Peter
and Papadakis, Christine M. and Müller-Buschbaum, Peter},
title = {{P}hase {S}eparation in {S}emidilute {A}queous {P}oly( {N}
-isopropylacrylamide) {S}olutions},
journal = {Langmuir},
volume = {28},
number = {23},
issn = {1520-5827},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {FZJ-2015-03370},
pages = {8791 - 8798},
year = {2012},
abstract = {The phase separation mechanism in semidilute aqueous
poly(N-isopropylacrylamide) (PNIPAM) solutions is
investigated with small-angle neutron scattering (SANS). The
nature of the phase transition is probed in static SANS
measurements and with time-dependent SANS measurements after
a temperature jump. The observed critical exponents of the
phase transition describing the temperature dependence of
the Ornstein–Zernike amplitude and correlation length are
smaller than values from mean-field theory. Time-dependent
SANS measurements show that the specific surface decreases
with increasing time after a temperature jump above the
phase transition. Thus, the formation of additional hydrogen
bonds in the collapsed state is a kinetic effect: A certain
fraction of water remains as bound water in the system.
Moreover, H–D exchange reactions observed in PNIPAM have
to be taken into account.},
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 = {54G - JCNS (POF2-54G24)},
pid = {G:(DE-HGF)POF2-54G24},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000305092700024},
doi = {10.1021/la3015332},
url = {https://juser.fz-juelich.de/record/201060},
}