R Sahraeian - Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran
M Esfandeh - Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran
S.M.R Paran - Department of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran

High tear resistance films of LDPE films containing various loadings of surface treated nanoperlites were prepared through a film blowing method and compared with the accordingly nanocomposites containing pristine nanoparticles. Atomic Force Microscopy (AFM) analysis was used to evaluate the effect of surface treatment of nanoperlite on the surface roughness of the nanocomposite films and dispersion state of nanoparticles. Tear resistance of LDPE films containing various pristine and surface treated nanoperlite was investigated. The AFM analysis show an increase in the surface roughness of the LDPE films with the incorporation of both pristine and surface treated nanoperlites. The quantitative results of AFM analysis show a lower surface roughness for the nanocomposites containing surface treated nanoperlite. Tear resistance analysis show that the surface treated nanoperlites has more pronounced effect on the improvement of tear resistance of LDPE films.

Nanocomposites- LDPE film- Nanoperlite- Surface treatment-Tear resistance