000825202 001__ 825202 000825202 005__ 20210129225237.0 000825202 0247_ $$2doi$$a10.1016/j.eurpolymj.2016.10.049 000825202 0247_ $$2ISSN$$a0014-3057 000825202 0247_ $$2ISSN$$a1873-1945 000825202 0247_ $$2WOS$$aWOS:000390497100039 000825202 037__ $$aFZJ-2016-07673 000825202 082__ $$a670 000825202 1001_ $$0P:(DE-HGF)0$$aKrakovský, Ivan$$b0$$eCorresponding author 000825202 245__ $$aSANS study on the surfactant effect on nanophase separation in epoxy-based hydrogels prepared from α,ω-diamino terminated polyoxypropylene and polyoxyethylene bis(glycidyl ether) 000825202 260__ $$aNew York, NY [u.a.]$$bElsevier$$c2016 000825202 3367_ $$2DRIVER$$aarticle 000825202 3367_ $$2DataCite$$aOutput Types/Journal article 000825202 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1484121012_30593 000825202 3367_ $$2BibTeX$$aARTICLE 000825202 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000825202 3367_ $$00$$2EndNote$$aJournal Article 000825202 520__ $$aEffect 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. 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