engleski

Radiation crosslinking for improvement of properties of (PEO)8ZnCl2 polyelectrolyte

Nanocomposite polymer electrolytes are coming to the focus of interests of scientists as it is expected them to be applied in construction of nanostructured solar cells and in the second generation of galvanic cells. Their electrical properties can be considerably improved by crosslinking. Thus the amorphous phase, which is more conductive than crystalline phase of polymer, can be enhanced. By initiation with ionising radiation we can avoid addition of initiators and achieve homogeneity of initiation throughout the whole sample. Primary poly(ethylene-oxide), PEO was crosslinked by y-irradiation of 60Co till chosen doses and used in preparation of (PEO)8ZnCl2 polymer electrolyte films with and without addition of nano-particles of Ti02. Electrical, thermical and optical properties of the polymer electrolytes were determined and as well as IR spectra were measured. With the increase of irradiation dose conductivity abruptly increase and the temperature of phase transition to the superionic phase is approaching the room temperature, which is optimal for the work of above-mentioned opto-electronic devices. Higher conductivity is achieved by the decrease of crystallinity as a result of the decrease of the size of spherulites. The growth of spherulites is suppressed with the crosslinking and addition of nano-particles of Ti02, which was confirmed by different methods.

nanocomposite polymer; (PEO)8ZnCl2; electrical properties; thermical properties; optical properties

nije evidentirano