Synthetic rubber
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A synthetic rubber is an artificial elastomer. They are polymers synthesized from petroleum byproducts. About 32 million tonnes of rubber is produced annually in the United States, and of that amount
John Boyd Dunlop (c. 1915)
Sheet of synthetic rubber coming off the rolling mill at the plant of Goodrich (1941)
World War II poster about synthetic rubber tires
O-ring
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An O-ring, also known as a packing or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compres
Some small O-rings
