Journal of Applied Polymer Science, Vol.63, No.8, 979-983, 1997
Properties of Films Obtained by UV-Curing 4,4’-Hexafluoroisopropylidenediphenoldihydroxyethylether Diacrylate and Its Mixtures with the Hydrogenated Homolog
A new ultraviolet(UV)-curable acrylic monomer, 4,4’-hexafluoroisopropylidene-diphenoldihydroxyethylether diacrylate, was synthesized : it was cured as a film and its properties compared with those of its fully hydrogenated homologue. The introduction of two CF3 groups into the monomer did not change its reactivity in the UV-curing reaction, but increased the glass transition temperature (T-g) of the cured polymeric film, decreased its refractive index (n), and lowered its surface tension. The fluorinated and the hydrogenated monomers were completely miscible and give homogeneous films : the T-g and n values were found linearly dependent on the fluorinated monomer content. The surface properties were deeply influenced by the presence of fluorine; a surface enrichment of the fluorinated monomer was evidenced by X-ray photoelectron spectroscopy analyses on the surfaces of the films obtained from mixtures of the two monomers.