Dielectric investigations of nanocomposites based on Matrimid and polyhedral oligomeric phenethyl-silsesquioxanes (POSS)

摘要: Abstract Matrimid and Matrimid/PhenethylPOSS nanocomposites films were prepared by solution casting. They can be considered as potential membrane materials for gas separation. Their dielectric properties investigated using Broadband Dielectric Spectroscopy (BDS) in combination with standard techniques. shows one relaxation process assigned β*-relaxation a conductivity contribution. The has high activation energy of 99 kJ/mol. Thus this is supposed to cooperative nature due π–π stacking the phenyl rings Matrimid. influence thermal history on was analyzed BDS well where an annealing effect found. show up concentration about 4 wt% PhenethylPOSS miscibility molecular level. For higher concentrations phase separated structure indicated. both systems explained which enhances charge transport.