Estimation of sp ectral conductivity of comp osite photopolymer systems for laser stereolithography

At the current stage of scientific and technological progress, the availability of environmentally efficient and flexible production methods is the basis of the industrial sector of any state. The authors investigate the behavioral features of photopolymer composite systems used in additive technologies, with an emphasis on the effect of photosensitivity and optical bandwidth on the kinetics of curing. The article discusses the effect of filler content on the optical and technological properties of composite photopolymer systems used in additive technologies, and the interaction features of their components. Special attention is paid to photopolymerization processes in the bath, which are based on the use of narrowband radiation in the visible spectrum. Methods for evaluating the optical and technological characteristics of photopolymer composite materials for additive technologies are examined. The results of a comprehensive study of optical, structural, and technological properties of photopolymer composite systems are presented. The method of molecular absorption analysis (IR spectroscopy) was used to evaluate the spectral transmittance of materials, which made it possible to identify the effect of filler and various component preparation modes on the optical density and manufacturability of the system. The data obtained confirm the importance of controlling the properties and interactions in the matrix–filler system to enhance the efficiency of photopolymerization and the resistance of final products to mechanical stress, and also optimize the synthesis and post-processing conditions in additive manufacturing.