Photocatalytic effects and surface morphologies of modified silicone-TiO2 polymer composites

► PEG2000-Silicone displayed superior degradation behavior when subjected to UV irradiation in the presence of TiO2. ► At 1450 cm−1 to Si-O-Si bending vibrations; its peak intensity did not undergo any apparent shift after 12 h. ► The intensities of the signals for C-H vibrations at 1567 and 2908 cm−1 did not change in the modified silicone/TiO2 composite films. ► After UV irradiation for 24 h, small cavities formed on the surface, but the film retained its integrity.