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@ARTICLE{Schneider:843893,
author = {Schneider, Florian and Balaceanu, Andreea and Di, Zhenyu
and Melnichenko, Yuri B. and Allgaier, J. and Pich, Andrij
and Schneider, Gerald J. and Richter, Dieter},
title = {{I}nternal structure and phase transition behavior of
stimuli-responsive microgels in {PEG} melts},
journal = {Soft matter},
volume = {13},
number = {15},
issn = {1744-6848},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2018-01420},
pages = {2738 - 2748},
year = {2017},
abstract = {In this work we investigated the behaviour of
stimuli-responsive poly(N-vinylcaprolactam) (PVCL) microgels
in poly(ethylene glycol) (PEGs) with a linear architecture.
We performed small-angle neutron scattering (SANS)
experiments at two different microgel concentrations and
various temperatures. The results were compared with those
on PVCL microgels in water. PVCL in PEG (molecular weight MW
= 2 kg mol−1) exhibits a volume phase transition
temperature (VPTT) at a temperature between 160 and 180 °C.
The diameter of the swollen microgel is only slightly
smaller than in water. Furthermore, with increasing
molecular weight of the surrounding polymer matrices fewer
chains penetrate the microgel particles. In agreement with
that, we identify a decreasing diameter with increasing
molecular weight. In the short chain polymers up to MW = 3
kg mol−1, PVCL is well dispersed in the matrices with only
minor signatures of agglomeration. For the well dispersed
systems, we find unperturbed chain conformation of the PEG.
Our results clearly show that the miscibility of PVCL and
PEG disappears in a molecular weight range of 3 to 10 kg
mol−1.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
JCNS-2},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106},
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},
pubmed = {pmid:28217774},
UT = {WOS:000399386000003},
doi = {10.1039/C6SM02501C},
url = {https://juser.fz-juelich.de/record/843893},
}