Syudy On Weather Resistance Of Nano-TiO₂ Modified Polyvinylidene Fluoride Film

Poly（vinylidene fluoride） is used as the spacecraft capacitor materials because of its excellent weather resistance, mechanical properties, and dielectric properties. In this paper,PVDF was chosen as the polymer matrix, while the nano-TiO₂ was chosen as the filler.The radiation resistance composite films with different contents of nano-TiO₂ and were prepared by solution cast method. The radiation experiment was done in a combined simulator for space environment to simulate VUV radiation, AO radiation. PVDF films and PVDF/TiO₂ composite films were irradiated and studied the change of mass loss,mechanical property, dielectric property, and the changes in chemical structure were analyzed with FTIR, XRD, DSC and SEM.The radiation results show that under the VUV radiation the mass loss, mechanical property and dielectric property of PVDF films and PVDF/TiO₂ composite films decrease,and the decrease was decline with the increase contents of nano-TiO₂.The mass loss,mechanical property and dielectric property of PVDF/TiO₂ composite films increase with the increase contents of nano-TiO₂.The AO radiation of four hours made the mass loss, mechanical property and dielectric property of PVDF films and PVDF/TiO₂ composite films decrease. The results show that the resistance of film increase with the increase of content of nano-TiO₂.The properties of PVDF films.The AO+VUV collaborative radiation of four hours made the mass loss, mechanical property and dielectric property of PVDF films and PVDF/TiO₂ composite films decrease.The properties of PVDF films and PVDF/TiO₂ composite films change with the increase of AO+VUV collaborative radiation times. The properties of PVDF films and PVDF/TiO₂ composite films decrease with the AO+VUV collaborative radiation.