INFLUENCE OF PHOTOPOLYMER RESIN MIXTURES ON PHYSICAL AND FRACTURE PROPERTIES

Marian BABAN, Alexandru-Viorel COȘA, Emanoil LINUL

Abstract


This study examines the fracture behavior of Single Edge Notched Bending (SENB) specimens produced using Digital Light Processing technology. The focus is on the effect of blending two UV resins (from pure White to pure Black) on fracture properties and specimen accuracy. The research also explores crack propagation mechanisms, along with the characteristics of SENB fracture surfaces. Findings indicate that the resin mixture significantly influences the investigated properties. Among the tested specimens, W75B25 mixture shows the highest mode I fracture toughness and fracture energy, while B100 exhibits the lowest. Additionally, W25B75 and W75B25 mixtures present the smallest dimensional errors, and B100 has the lowest mass. The specimens exhibit brittle behavior, with cracks initiating from the notch tip and no observed plastic deformation.

References


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