2025-05-272025-05-272025-04-02SENA, Siandro Sales. Influência da variação de octoato de cobalto nas propriedades térmicas e mecânicas na resina de poliéster isoftálico. Orientador: Edinaldo José de Sousa Cunha. 2025. 65 f. Trabalho de Curso (Bacharelado em Engenharia de Materiais) – Faculdade de Engenharia de Materiais, Campus Universitário de Ananindeua, Universidade Federal do Pará, Ananindeua, 2025. Disponível em: https://bdm.ufpa.br/handle/prefix/8220. Acesso em:.https://bdm.ufpa.br/handle/prefix/8220The pursuit of polymeric materials with enhanced performance and cost-effectiveness has driven research into the modification of polyester resins, which are extensively utilized in the automotive, naval, and construction industries. Among the key factors influencing their final properties, the curing process plays a crucial role, being governed by catalysts and accelerators. This study examines the impact of varying cobalt octoate concentrations on the production of isophthalic polyester resin, with a particular focus on thermal behavior and mechanical properties. The precise adjustment of cobalt octoate concentration is essential, as it directly affects material strength, volumetric shrinkage, and overall production efficiency. To this end, experimental procedures were conducted involving the synthesis of isophthalic polyester resins with distinct cobalt octoate concentrations (0.5%, 1.0%, and 1.5%). The curing time and temperature were systematically monitored, alongside the mechanical strength of the resulting materials. Furthermore, statistical analyses were performed to evaluate the relationships between these variables. The findings indicate that increasing the accelerator concentration does not linearly enhance the curing process efficiency. Additionally, a higher curing temperature was observed to contribute to superior mechanical strength. Moreover, elevated cobalt octoate concentrations resulted in thinner test specimens due to volumetric shrinkage during the curing process. Furthermore, the highest mechanical strength was achieved at the lowest cobalt octoate concentration (0.5%) under elevated temperatures, highlighting that optimizing the cobalt octoate concentration can yield materials with improved mechanical performance and reduced production costs. This research underscores the critical influence of cobalt octoate concentration on the thermal and mechanical properties of isophthalic polyester resins, emphasizing the necessity of balancing accelerator concentration, curing temperature, and final material characteristics to achieve optimal performance.Acesso AbertoOctato de cobaltoResina de poliéster isoftálicoComportamento térmicoPropriedades mecânicasCura de polímerosCobalt octoateIsophthalic polyester resinThermal behaviorMechanical propertiesPolymer curingCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS::POLIMEROS, APLICACOESTrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil