Some Parameters Affecting the Properties of NBR-LLDPE Blends Crosslinked with Gamma Radiation

Abstract

Radiation crosslinking of NBR-LLDPE blends with different blend ratios has been carried out. It has been found that the addition of LLDPE markedly improves the mechanical properties of NBR. For instance, Young's modulus attains about 7MPa and the tensile strength attains 14MPa in the blend containing 80wt.% LLDPE, while these values do not exceed 0.5 and 2MPa for the blend containing 20wt.% LLDPE. These values depend on both blend ratio and irradiation dose. It has also been found that the soluble fraction of the samples in different solvents depends on the blend ratio and irradiation dose. The thermal characteristics of the blends using DSC showed that the two blends are incompatible with each other and the glass transition temperature of NBR is shifted to a higher temperature by increasing the radiation dose.