Production of microporous films of poly(vinylidene fluoride-trifluoroethylene)

Abstract

The paper presents the results of a study of the effect of temperature and relative humidity of the environment on the structure of microporous films of copolymer P(VDF-TrFE) obtained by the phase-inversion method. It is shown that with increasing humidity the pore size of the film increases, while increasing temperature leads to their reduction. The optimal range of external environmental conditions for obtaining porous films with a honeycomb pattern is proposed. The influence of different solvents on the film porosity has been shown and it has been revealed that it is the low-temperature aprotic polar solvents (for example, acetone), unlike the high-temperature ones, that give the film porosity as a result of a higher solvent evaporation rate.