Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 13 1 2026 04 01 Study on Thermal, Mechanical and Dynamic Properties of Epoxy Matrix with Hybrid of ‎Nanoclay/Carbon Nanotube 37 56 9598 10.22075/macs.2025.34769.1698 EN Shadi Afshin Mechanical Engineering Department, Razi University, Kermanshah, 6714414971, Iran Mohammad Hossein Yas Mechanical Engineering Department, Razi University, Kermanshah, 6714414971, Iran Journal Article 2024 07 16 Hybrid polymer nanocomposites (HPNCs) represent a promising class of materials for various engineering applications. This study investigates the impact of combining nano clay (NC) and carbon nanotubes (CNTs) on the thermal and mechanical properties of epoxy matrices. Mechanical and thermal properties of HPNCs were characterized using TGA, DMTA, TMA, and SEM, and tested for flexural, tensile, shear, hot plate, and modal analyses. The obtained results were compared with similar theoretical ones from the Halpin-Tsai method. Results indicate that incorporating up to 5 wt % of NC alongside epoxy/CNT nanocomposites enhances CNT dispersion, leading to improvements in degradation temperature (+1%), glass transition temperature (+10%), thermal stability (50% increase in residual ash), storage modulus in the plastic range (+39%), transverse bond density (+41%), thermal expansion coefficient (-17%), flexural strength (+17%), elastic modulus (+85%), shear modulus (+11%), and natural frequency of the beam (+42%). https://macs.semnan.ac.ir/article_9598_57b570b1bd14268e718bbb83056782ec.pdf