Neoprene
Carothers began working at the DuPont Experimental Station on February 6, 1928. The synthesis of a polymer with a molecular weight of more than 4,200, the mass achieved by Dr. Emil Fischer, was his primary goal.
By the summer of 1928, Carothers boasted a small staff of Ph.D. chemists and two consultants: Dr. Roger Adams, his thesis advisor, and Dr. Carl Marvel, his instructor of organic chemistry at the University of Illinois. The laboratory where these top scientists worked became known as "Purity Hall". It was discouraging that by the middle of 1929, "Purity Hall" had not produced a polymer with a weight of much over 4,000.
In January 1930, Dr. Elmer K. Bolton became assistant chemical director in the chemical department, and thus, Carothers' immediate boss. Bolton wanted practical results in 1930, and his wish was fulfilled. Bolton asked Carothers to examine the chemistry of an acetylene polymer with the goal of creating synthetic rubber. In April 1930 one of Carothers' staff, Dr. Arnold M. Collins, isolated chloroprene, a liquid which polymerized to produce a solid material that resembled rubber. This product was the first synthetic rubber and is known today as Neoprene.
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