Evaluation of the optomechanical effect in coatings made of photopolymers

The study on the optomechanical effect (photostriction) in the material used in 3D printing by layer-by-layer photopolymerization is performed. The calculation - experimental model in the form of a steel console plate with the one-sided photopolymeric coating is developed for studying of this effect. The experimental setup including UV source, the set of irradiated identical consoles, part of which had the photopolymer coating, the speckle-interferometer device for registration of bending micro displacements of the consoles called by photostriction shrinkage of the coating, is collected. The temperature bending of the plate during is irradiation by the UF-source was determined. The Magnitude of the optomechanical shrinkage in comparison with the temperature bending of the plate with a photopolymeric coating at the fixed radiation time is experimentally determined. The technique is developed for calculation and allocation of the optomechanical effect against the background of temperature bending of the plate with a photopolymeric coating and value of earlier undetermined coefficient of linear dilatation of the photopolymer is obtained. Also the residual stresses which generate in the coating owing to optomechanical effect are defined.