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Abstract
A study of the effects of two component compatibilizers, epoxidized natural rubber (ENR) and ethylene-co-acrylic acid copolymer (EAA) on curing characteristics, mechanical properties, swelling behavior, and morphology of silica-filled natural rubber (NR)/recycle rubber powder (RRP) blends was carried out. Results indicate that the presence of ENR/EAA has reduced the cure time, t 90, improved processability, and increased cross-link density of the silica-filled NR/RRP blends. The mechanical properties such as tensile strength, tensile modulus, and hardness were also enhanced with the presence of ENR/EAA. The improvement of mechanical properties was due to the higher cross-link density and better interaction between silica and NR/RRP blends with the presence of ENR/EAA as two component compatibilizers.