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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:32 |
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Conference: Bucharest University Faculty of Physics 2011 Meeting
Section: Polymer Physics
Title:
Thermal properties of polypyrrole modified perfluorosulfonated membranes
Authors:
Adriana Andronie(1), I. Stamatin(1), St. Antohe(2), Nicoleta Banu(1), Cristina Serban(1), St. Iordache(1), Ana Cucu(1), S. Stamatin(1), C. Ceaus(1), Mariana Ceaus(1).
Affiliation:
(1)University of Bucharest, Faculty of Physics, 3Nano-SAE Research Centre, P.O.Box MG-38, 077125 Magurele, Romania
(2)University of Bucharest, Faculty of Physics, Mat&Devices Elect&Optoelctr Center, P.O. Box MG-11, 405 Atomistilor Str., 077125, Magurele, Romania
E-mail
office@3nanosae.org
Keywords:
Polypyrrole, perflourosulfonated membrane, thermal behavior
Abstract:
Intrinsic conducting polymers impregnated into proton exchange membranes are a viable approach for fuel cell performance improvement from thermal, mechanical and methanol crossover point of view. The aim of this study is to investigate thermal behavior of perflourosulfonated membranes modified via polypyrrole (PPY) polymerization into membrane pores. PPY concentration was controlled by precursor loading and oxidant exposure time. Specific structural features of the modified membranes were investigated by Fourier transform infrared spectroscopy. Thermo-gravimetric analysis and differential scanning calorimetry were employed for the study of thermal stability and degradation processes. Activation energies related to polymer thermal degradation reactions were evaluated using both Horowitz and Metzger model and Broido method. Results show that as PPY content increases, a significant decrease of the activation energy is obtained, while the onset temperature of the thermal degradation is slightly shifted to lower temperatures. A general evaluation of the PPY modified PFSA membranes is provided in terms of thermal stability and activation energies.
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