This thesis investigates the thermal and mechanical behavior of interpenetrating polymer network (IPN) resins developed for hot lithography, a breakthrough technology in additive manufacturing and vat photopolymerization over the past decade. Methacrylate resins are extensively utilized in 3D printing technologies due to their high reactivity and excellent printability. However, their inherent brittleness limits their mechanical performance. In contrast, epoxy resins exhibit strength, durability, and load-bearing capacity. The formation of interpenetrating polymer networks (IPNs) by combining methacrylate and epoxy systems represents a synergistic strategy that integrates the advantageous properties of both materials, thereby enhancing the overall performance of the resulting polymer network.