Distribution of oil in olefinic thermoplastic elastomer blendsDistribution of oil in olefinic thermoplastic elastomer blends Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-242005enThe distribution of processing oil in two olefinic thermoplastic elastomer (OTPE) blends was determined using dielectric spectroscopy. The OPTE blends are blends of dynamically vulcanised EPDM with polypropylene (PP), TPVs, and blends of PP with SEBS. Both blend types contain paraffinic oil, which is present in both the PP and in the elastomer phase. The determination of the actual oil concentration by measuring the reduction in the glass transition temperatures (Tg) is inaccurate using DSC or DMA, because the glass transition dynamics of the two phases overlap. The blends were made sensible for dielectric spectroscopy by the addition of a probe molecule. The oil distribution was determined by modelling of the dielectric loss of the OPTE blends in the Tg regime from the ones of the binary mixtures. The mean value for the oil distribution coefficient was found to be 0.6 for PP/SEBS blends and 0.63 for TPVs.http://creativecommons.org/licenses/by/4.0/Polymer46176391-6401 Sengers W. G. F. Wübbenhorst M. Picken Stephen J. Gotsis Alexandros Γκοτσης Αλεξανδρος Elsevier Oil concentration Thermoplastic elastomer BDS (Spectrum analysis) Dielectric spectroscopy, Broadband broadband dielectric spectroscopy bds spectrum analysis dielectric spectroscopy broadband