، صفحه 0-0 (1)

عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)

In present experimantal work, the effect of different doses (0, 25 and 100 kGy) of gamma irradiation of hexagonal boron nitride/high-density polyethylene (hBN/HDPE) composites was studied in the presence and absence of Maleic Anhydride-Grafted High-Density Polyethylene (HD-g-MA) as compatibilizer. The composites were prepared by melt-mixing method. Gamma irradiation originates free radicals which can induce chain scission or recombination of radicals, contributing its annihilation, branching or crosslinking reactions. The impact of structural changes on HDPE mechanical strength, modulus and elongation at break properties as a result of the predominance of oxidative degradation in air or cross-linking have been provided in this paper. The results revealed some variations in the properties depending on the dose in air atmosphere. It can be observed an increase in the value of modulus; a reduction in tensile strength and elongation at break show a direct evidence of degradation of polymeric chain particularly in presence of compatibilizer.

Gamma irradiation؛ Polymers؛ Mechanical properties؛ High-density polyethylene؛ Composite