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000903633 1001_ $$00000-0002-0074-5657$$aSmith, Gregory N.$$b0$$eCorresponding author
000903633 245__ $$aThe microscopic distribution of hydrophilic polymers in interpenetrating polymer networks (IPNs) of medical grade silicone
000903633 260__ $$aOxford$$bElsevier Science$$c2021
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000903633 520__ $$aBy introducing hydrophilic polymers into silicone medical devices, highly beneficial biomedical properties can be realized. An established solution to introduce hydrophilic polymers is to form an interpenetrating polymer network (IPN) by performing the hydrogel synthesis in the presence of silicone swollen in supercritical carbon dioxide. The precise distribution of the two polymers is not known, and determining this is the goal of this study. Neutron scattering and microscopy were used to determine the distribution of the hydrophilic guest polymer. Atomic force microscopy revealed that the important length scale on the surface of these materials is 10–100 nm, and spin-echo small-angle neutron scattering (SESANS) on IPNs submerged in D2O revealed structures of the same scale within the interior and enabled quantification of their size. SESANS with hydration by D2O proved to be the only scattering technique that could determine the structure of the bulk of these types of materials, and it should be used as an important tool for characterizing polymer medical devices.
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000903633 65017 $$0V:(DE-MLZ)GC-1602-2016$$2V:(DE-HGF)$$aPolymers, Soft Nano Particles and  Proteins$$x0
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000903633 7001_ $$00000-0003-4377-8747$$aBrok, Erik$$b1
000903633 7001_ $$00000-0001-6973-3155$$aSchmiele, Martin$$b2
000903633 7001_ $$00000-0002-8998-9390$$aMortensen, Kell$$b3
000903633 7001_ $$00000-0002-5331-8085$$aBouwman, Wim G.$$b4
000903633 7001_ $$00000-0002-3263-963X$$aDuif, Chris P.$$b5
000903633 7001_ $$00000-0002-2184-3360$$aHassenkam, Tue$$b6
000903633 7001_ $$00000-0003-4991-4519$$aAlm, Martin$$b7
000903633 7001_ $$00000-0002-1183-8795$$aThomsen, Peter$$b8
000903633 7001_ $$00000-0002-4694-4299$$aArleth, Lise$$b9
000903633 773__ $$0PERI:(DE-600)2013972-X$$a10.1016/j.polymer.2021.123671$$gVol. 224, p. 123671 -$$p123671 -$$tPolymer$$v224$$x0032-3861$$y2021
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