Engineering / Nanoparticle / Proton Exchange Membrane / Polymer Blends / Proton Exchange Membrane Fuel Cells / PEMFC / Composite Material / High Temperature / CHEMICAL SCIENCES / Ambient Temperature / Infrared Spectrometry / FT IR / FT IR Spectroscopy / Elevated Temperature / Intermolecular Interaction / Fourier Transformation / PEMFC / Composite Material / High Temperature / CHEMICAL SCIENCES / Ambient Temperature / Infrared Spectrometry / FT IR / FT IR Spectroscopy / Elevated Temperature / Intermolecular Interaction / Fourier Transformation