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@ARTICLE{Krakovsk:825202,
author = {Krakovský, Ivan and Szekely, Noemi},
title = {{SANS} study on the surfactant effect on nanophase
separation in epoxy-based hydrogels prepared from
α,ω-diamino terminated polyoxypropylene and
polyoxyethylene bis(glycidyl ether)},
journal = {European polymer journal},
volume = {85},
issn = {0014-3057},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2016-07673},
pages = {452 - 465},
year = {2016},
abstract = {Effect of a cationic surfactant (myristyltrimethylammonium
bromide, C14TAB) on swelling behaviour of epoxy network
containing polyoxyethylene (POE) and polyoxypropylene (POP)
and structure of resulting hydrogels was studied using
small-angle neutron scattering (SANS).Nanophase separated
structure of hydrogel prepared by swelling of the network in
pure water was revealed. Characteristic length scale of the
structure as measured by Bragg’s distance is ca 78 Å. The
structure consists of water-poor and water-rich nanodomains
separated by a diffuse interface of effective thickness ca 5
Å. Presence of the surfactant in swelling solution has a
strong effect on swelling behaviour of the epoxy network and
structure of resulting hydrogels. At the macroscopic level,
both, the swelling degree and surfactant uptake by the
network increase considerably with growing surfactant
concentration in swelling solution. At the microscopic
level, the two-phase nanophase separated structure is
preserved, however, it becomes finer as expressed by a
continuous decay of Bragg’s distance from 78 Å (in
absence of the surfactant) to 61 Å (highest surfactant
concentration). Effective thickness of interface varies
between ca 3–6 Å. Presence of the surfactant also induces
variation of the neutron scattering length density at much
longer length scale of ca 200–1200 Å. Strong binding of
the surfactant to POP chains in epoxy network is responsible
for the effects observed.},
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 = {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)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000390497100039},
doi = {10.1016/j.eurpolymj.2016.10.049},
url = {https://juser.fz-juelich.de/record/825202},
}