Abstract
The influence of carbon black on the aging properties of NR was studied by adding different grades and contents of carbon black. The results show that the hardness, tensile strength and tear strength of NR increased with the increase of carbon black level and content, while the elongation at break and Akron abrasion decreased. After hot air accelerated aging and ultraviolet aging, the tensile strength, elongation at break and Akron abrasion of NR decreased, the tear strength first decreased and then increased, and the shore hardness gradually increased. With the increase of carbon black grade and quantity, the change rate of natural rubber aging properties, such as shore hardness, tensile strength, elongation at break, tear strength and Akron abrasion, became smaller and smaller.
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