Yargı, ÖnderUgur, SaziyePekcan, Önder2019-06-272019-06-27201361053-05091053-0509https://hdl.handle.net/20.500.12469/814https://doi.org/10.1007/s10895-013-1157-2This study examines the oxygen diffusion into polystyrene (PS) latex/multiwalled carbon nanotube (MWNT) nanocomposite films (PS/MWNT) consisting of various amounts of MWNT via steady state fluorescence technique (SSF). PS/MWNT films were prepared from the mixture of MWNT and pyrene (P)-labeled PS latexes at various compositions at room temperature. These films were then annealed at 170 A degrees C above glass transition (T-g) temperature of PS. Fluorescence quenching measurements were performed for each film separately to evaluate the effect of MWNT content on oxygen diffusion. The Stern-Volmer equation for fluorescence quenching is combined with Fick's law for diffusion to derive the mathematical expressions. Diffusion coefficients (D) were produced and found to be increased from 1.1 x 10(-12) to 41 x 10(-12) cm(2)s(-1) with increasing MWNT content. This increase was explained via the existence of large amounts of pores in composite films which facilitate oxygen penetration into the structure.eninfo:eu-repo/semantics/openAccessCarbon nanotubesFluorescenceDiffusionOxygenQuenchingComposite filmArticle357366323WOS:00031907940000110.1007/s10895-013-1157-22-s2.0-84878252946N/AN/A23334487