Acousto-optical investigations of the phase transitions in the oligoethermetacrylates

We investigated the changes of acousto-optical quality coefficients in olygoethermethacrylate photopolymers of the different chemical contents from temperature. It was revealed that increasing of the aromatic's rings leads to increasing of the acousto-optical quality coefficients M, and only after we have observed the influence of the distances between the C equals O chemical bonds. We also found an increasing of M with the decrease of the temperature below the 80...100 K. The maximal value of the M reaches its value at 4.2 K. The data obtained are in good agreement with previous investigations of the optical second harmonic generation. An essential influence of external electric field on the acousto-optical properties of the mentioned photopolymers was revealed. In our opinion it reflects an essential role of the acentrical quasicrystallines, which give contributions into the piezo-optical constants.