Influence of Aluminum Hydroxide Concentration in a Liquid Photocuring Resin on the Properties of Cured Specimens

Abstract—The work is aimed at improvement of the mechanical properties of polymers produced using laser stereolithography technology by modifying the composition of a photocuring resin (PCR) with a highly dispersed filler. A composition based on vinyl ester resin was developed as the starting material, and aluminum hydroxide was chosen as the filler. The addition of the filler to the original PCR leads to a noticeable increase in the viscosity of the composition at 25°C. Specimens obtained both by laser stereolithography technology and by initiating polymerization by incoherent UV radiation were studied simultaneously for comparison. A thermomechanical analysis of the specimens was carried out and their studies were carried out using the differential scanning calorimetry method to determine the thermomechanical characteristics and the degree of conversion of double bonds for these specimens. It has been confirmed that post-curing of specimens is a necessary step in achieving their high mechanical properties. It has been shown that the use of aluminum hydroxide as a PCR filler improves the physicomechanical and thermomechanical properties of cured specimens.