Poly (ethylene terephthalate) (PET)/SiO2/TiO2 hybrid composites were synthesized via the sol-gel method in the presence of tetraethylorthosilicate (TEOS) and tetrabutyltitanate (TBT). The formation of Si-O-Ti bonds in the resulting products was confirmed by Fourier transform infrared spectroscopy (FTIR) analysis. The Photo-degradation properties of hybrid composites were investigated under the ultraviolet radiation. And the change of the intrinsic viscosity for the hybrid composites was measured using an Ubbelohde viscometer after the photo-degradation.
Poly (ethylene terephthalate) (PET)/SiO2/TiO2 hybrid composites were prepared via the Sol-gel method that involves two steps: the as-prepared PET was dissolved into the mixed solution of phenol and dichloroethane by adjusting the pH value of the reaction system to 2～3 using acetic acid; then both the tetraethylorthosilicate (TEOS) and the tetrabutyltitanate (TBT) were successively added to the hybrid solution followed by the Sol-Gel reactions at strong stirring to form the three PET/SiO2/TiO2 composites with cohydrolysis-condensation reaction. The intrinsic viscosity of the hybrid composites were measured by using an Ubbelohde viscometer. The resulting products with the different SiO2-TiO2 content were thoroughly characterized with FT-IR.
Study on the Crystallization of Poly(ethylene terephthalate)/ SiO2/TiO2 Hybrid Nanocomposites by Sol-Gel Method