Static and dynamic mechanical properties of poly(vinyl chloride) loaded with aluminum oxide nanopowder

摘要

A series of nanocomposites from poly(vinyl chloride) loaded with different concentrations of A1_2O_3 nanopowder was prepared. The tensile mechanical properties of these composites were studied at differ ent temperatures namely; stress-strain curves. The elastic modulus was calculated and found to decrease with increasing both filler loading and temperature. The strain at a certain stress at different tempera tures was studied and the thermal activation energy for polymer chains was calculated. The complex vis cosity as well as the storage modulus was found to decrease with increasing the filler loadings at different frequencies. The relaxation time of the polymer matrix was calculated and found to independent on the concentration of the filler but it decreased linearly with increasing frequency. The glass transition tem perature was found to increase with increasing both filler loading and frequency.