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David Spence (rubber chemistry)
David Spence was one of the pioneering rubber chemists. He helped the war effort during the Second World War by devising new ways of extracting natural rubbers from plants, and worked to improve the processing of the rubber. Over the course of his career, he worked to improve the dyeing processes for rubber products and the vulcanization of rubber, and in developing new accelerants for strengthening lower-quality natural rubber. In 1941, he became the first recipient of the Charles Goodyear Medal, awarded by the American Chemical Society.
==Biography==
Spence earned his PhD from the University of Jena in Germany in 1906. Three years later, he accepted a position as the research lab director at the Diamond Rubber Company in Akron, Ohio.
He stayed at Diamond Rubber after it was purchased by B.F. Goodrich in 1912. There, he succeeded in synthesizing isoprene for use in synthetic rubber. He left the company in 1914, and started the Norwalk Tire & Rubber Company, where he was vice president and manager until 1925. He retired in 1931, after which he continued to do his own rubber research.
During his career, he was responsible for developing several different processes: he developed accelerators for the vulcanization process; a process to devulcanize rubber; a system to extract natural rubber from guayule; and a process to modify the physical properties of rubber. During World War I, Spence headed the National Research Council's Rubber Division, and he was a consultant to the War Production Board during World War II. In 1941, he became the first recipient of the Charles Goodyear Medal.〔 He died on September 24, 1957 in New York.
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