Polyacrylates (PAK) are polymers which are widely used for the protection of materials due to their properties so they are used as protective coatings. Adding certain nanofillers into a polymer, such as titanium dioxide (TiO2), produce a nanocomposite with significantly better properties compared to the pure polymer. Purpose of this thesis is to determine influence of TiO2 nanoparticles concentration on the properties of polyacrylate film after exposure to ultraviolet (UV) radiation. PAK/TiO2 films are prepared in two ways: by in situ emulsion polymerization and by ex situ preparation. Purpose of characterization PAK/ TiO2 films is to determine: morphology, temperature of glass transition (Tg), chemical structural changes, solubility in tetrahydrofuran (THF) and molecular weight distributions. Micrographs of films showed that with ex situ preparation filler agglomerates are formed in the film, while in films prepared by in situ polymerization agglomerates were not visible, which indicates significantly better particles dispersion during in situ polymerization than ex situ preparation. The results of differential scanning calorimetry (DSC) showed that exposure of UV radiation leads to an increase in glass transition temperature due to crosslinking in the structure. Also, films prepared by in situ polymerization have a lower glass transition temperature compared to film prepared ex situ due to worse particle dispersion. The results of infrared spectroscopy with Fourier transformation (FTIR) indicate structural changes in pure PAK films and films prepared by ex situ process due to UV radiation, while for films prepared in situ there are no significant changes. Dissolution of films in THF resulted in dissolution of PAK and PAK/TiO2 films that were not exposed to UV radiation and films that were exposed only 24 hours, while films exposed to UV radiation for 72 hours and 144 hours did not dissolve in THF. This indicates that prolonged exposure of the films to UV radiation results in crosslinking in the structure of the PAK. The results of size exclusion chromatography (GPC) showed that 24 hours of UV radiation leads to changes in the molecular weights distribution, which are more pronounced in ex situ systems than in situ systems.