Antioxidant polymer foams and uses thereof are described herein. These foams are synthesized using a Carboni-Lindsey reaction of 1,2,4,5-tetrazine with a polymer having alkenyl functional groups. The foams feature dihydropyridazine functional groups which can be oxidized to consume surrounding reactive oxidizing chemicals and are consequently antioxidant.

A rubber composition of the present technology for a conveyor belt contains a diene rubber and a carbon black, the diene rubber containing: a natural rubber; and a modified butadiene rubber obtained by modifying a butadiene rubber with a nitrone compound; the content of the natural rubber in the diene rubber being 30 to 85 mass %, and the content of the modified butadiene rubber in the diene rubber being 15 to 70 mass %.

A rubber composition of the present technology for a conveyor belt contains a diene rubber and a carbon black, the diene rubber containing: a natural rubber; and a modified butadiene rubber obtained by modifying a butadiene rubber with a nitrone compound; the content of the natural rubber in the diene rubber being 30 to 85 mass %, and the content of the modified butadiene rubber in the diene rubber being 15 to 70 mass %.