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@INPROCEEDINGS{Kyrey:874707,
author = {Kyrey, Tetyana and Witte, Judith and Stingaciu, Laura and
Witt, Marcus and von Klitzing, Regine and Wellert, Stefan
and Holderer, Olaf},
title = {{S}tructure and dynamics of homogeneously and
heterogeneously crosslinked {PNIPAM} microgels},
reportid = {FZJ-2020-01622},
year = {2020},
abstract = {Thermoresponsive poly(N-isopropylacrylamide) microgel
particles have been largely studied in the past due to their
interesting fundamental properties as well as their
potential for application in drug delivery, sensor
technology or biotechnology. In this contribution, microgel
particles with homogeneous and heterogeneous crosslink
distribution and different crosslinker concentrations will
be studied with small angle neutron scattering (SANS) and
neutron spin echo spectroscopy (NSE).The segmental dynamics
of polymer chains in solution, as described by the Zimm
model, is modified in microgels due to the presence of
crosslinks and the crowded environment inside the particle,
both inducing heterogeneities, for example “frozen”
inhomogeneities or density fluctuations. Such structural
heterogeneities have an impact on the segmental chain
dynamics, which makes NSE, the highest resolution neutron
spectroscopy technique, the experiment of choice for
accessing variations and changes induced by changes in
crosslink distribution and crosslink density.An outlook on
interface effects on the internal structure and
inhomogeneities of microgel particles will be given.*Support
of the DFG (grant number WE5066/3-1 (S. Wellert) and HO
5488/2-1 (O. Holderer) is acknowledged.},
month = {Mar},
date = {2020-03-02},
organization = {APS March Meeting 2020, Denver (USA),
2 Mar 2020 - 6 Mar 2020},
subtyp = {After Call},
cin = {JCNS-FRM-II / JCNS-1 / MLZ},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G15 /
G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-Juel1)SNS-NSE-20150203
/ EXP:(DE-MLZ)KWS3-20140101 / EXP:(DE-MLZ)KWS2-20140101 /
EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/874707},
}