Fractographic study of vinylidene polyfluoride copolymers by scanning electronic microscopy

This work enabled the observation of the emulsifying effect of a synthesized copolymer. The surface quality of the prepared alloys fracture was analyzed using the SEM. The examination of the stereotypes obtained on various alloys allowed the visualization of the two involved phases system. We observed on the initial mixture a continuous more or less extended PVDF phase, in which polystyrene PS nodules were inserted, forming a heterogeneous system. In addition, with certain films we noticed that, as the emulsifying rate of the mixture increases, the size of the PS nodules formed decreases significantly. Thus, it appears that in these mixtures the emulsifier agent seems to play a major role in the phase size reduction and subsequently in the increase of the dispersion state. On the other hand, it appears that more the concentration of the emulsifying agent increases, more the size of the phases decreases. All these observations confirm the emulsifying effect of our copolymer.