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@ARTICLE{Gawlitza:186434,
author = {Gawlitza, Kornelia and Radulescu, Aurel and von Klitzing,
Regine and Wellert, Stefan},
title = {{O}n the structure of biocompatible, thermoresponsive
poly(ethylene glycol) microgels},
journal = {Polymer},
volume = {55},
number = {26},
issn = {0032-3861},
address = {Oxford},
publisher = {Elsevier Science},
reportid = {FZJ-2015-00510},
pages = {6717 - 6724},
year = {2014},
abstract = {The aim of the present study is the preparation and
characterization of microgel particles which are, contrary
to other microgels, thermoresponsive as well as
biocompatible. Hence, monodisperse p-MeO2MA-co-OEGMA
microgel particles were synthesized by precipitation
polymerization. Swelling/deswelling behavior and the
structure of poly(ethylene glycol) (PEG) based microgel
particles were investigated. A combination of dynamic light
scattering (DLS) and small angle neutron scattering (SANS)
was used. Particle size and the volume phase transition
temperature (VPTT) are adjustable by changing the amount of
comonomer. SANS measurements indicate an inhomogeneous
structure of the PEG microgels in the swollen state. At
temperatures above the VPTT a compact structure was
observed. An increase of the comonomer content leads to a
densely packed core and a fuzzy shell in the swollen state.
Additionally, nanodomains inside the polymer network were
observed in the temperature range around the volume phase
transition (VPT). Due to this heterogeneous structure in the
swollen state two correlation lengths of the network
fluctuations were observed.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
ICS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)ICS-1-20110106},
pnm = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
(POF2-54G24)},
pid = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000346887700010},
doi = {10.1016/j.polymer.2014.10.069},
url = {https://juser.fz-juelich.de/record/186434},
}