چكيده لاتين :
Effects of electron beam irradiation on the mechanical properties and morphological
structure of natural rubber (NR)/linear-low density polyethylene (LLDPE) blend
was investigated. The NR/LLDPE blend was prepared by melt blending in a Haake
internal mixer at 140oC, rotor speed of 50 rpm, and in 15 min. Liquid natural rubber (LNR)
was incorporated into the blend as a compatibilizer. Samples in the form of 1 mm sheets
were exposed to 50-300 kGy of electron beam irradiation and analyzed for swelling index
and gel content, tensile strength, and surface morphology. The result indicated that gel
content and mechanical properties of the samples increased with radiation dosage. The
honey-comb structure of the surface morphology in low dosage irradiated samples slowly
transformed into a continuous matrix on increasing radiation dose. The variation of
mechanical and physical properties was due to increase in cross-linking density in the
rubber and plastic phases and rubber-plastic interaction on irradiation.
