احسان اصغری

The application of nanoclays in poly (vinyl chloride) (PVC) is limited because the organic modifiers in conventional nanoclays can degrade PVC. The effects of two types of nanoclays, magnesium aluminum-layered double hydroxide (MgAl-LDH) and alkylammonium-modified montmorillonite (OMMT), were studied on the mechanical properties of PVC nanocomposites. Dioctyl phthalate (DOP)-plasticized PVC was used as the matrix. Samples containing 1, 3, and 5 (phr) of nanoclay were prepared, and their mechanical and rheological properties were measured. OMMT nanoclay reduced the thermal stability of PVC despite improving its mechanical properties. In contrast, simultaneous improvement in the mechanical properties and thermal stability of PVC nanocomposites was observed with MgAl-LDH nanoclay. Results from the dynamic mechanical thermal analysis (DMTA) test indicated an increase in the storage modulus and glass transition temperature with the addition of MgAl-LDH nanoclay, highlighting its significant impact. However, results from rheometer mechanical spectroscopy (RMS) revealed no notable differences in the complex modulus, viscosity, and loss modulus