Neto, A. M. FigueiredoGodinho, M. H.Toth-Katona, T.Palffy-Muhoray, P.2020-06-092020-06-092005-03-010103-9733PURE: 18496931PURE UUID: 2474e562-01cc-45f6-a7a4-3f90a30f0c0eScopus: 17544373270WOS: 000228270000016http://hdl.handle.net/10362/99075Magnetic nanoparticles from magnetic colloidal suspensions were incorporated in the urethane/urea elastomer (PU/PBDO) by swelling fully crosslinked elastomer samples with a toluene and ferrofluid mixture. It is shown that ferrofluid grains can be efficiently incorporated into the matrix of elastomers. The dependence of the birefringence of both the pure and ferrofluid-doped elastomer samples on strain is linear. The ratio of birefringence to strain of the ferrofluid-doped samples is greater than that of the pure elastomer samples, indicating that ferrofluid grains are oriented by the strained polymer network. We propose that this strain-induced orientation is due to the shape anisotropy of the nanoparticles.6172527engGeneral Physics and Astronomyjournal article10.1590/S0103-97332005000100016https://www.scopus.com/pages/publications/17544373270