Surface formation in polystyrene blends with poly [bis(trifluoroethoxy)phosphazene]

The surface of polystyrene blends with linear and branched poly [bis(trifluoroethoxy)phosphazene] having different molecular masses was studied using the method of X-ray photoelectron spectroscopy. Under nonequilibrium conditions, the surface concentration of poly[bis(trifluoroethoxy)phosphazene] was shown to decrease with increasing molecular mass. The effect of thermal annealing on the surface composition of the blends was estimated. Annealing of samples containing a linear poly[bis(trifluoroethoxy)phosphazene] with a higher molecular mass is shown to intensify surface segregation. The annealing of blends with a branched poly [bis(trifluoroethoxy)phosphazene] with a lower molecular mass under the same conditions caused its degradation.