Synthetic rubber
A synthetic rubber is an artificial
History of synthetic rubber
The expanded use of bicycles, and particularly their pneumatic tires, starting in the 1890s, created increased demand for rubber. In 1909, a team headed by Fritz Hofmann, working at the Bayer laboratory in Elberfeld, Germany, succeeded in polymerizing isoprene, making the first synthetic rubber.[2][3]
Studies published in 1930 written independently the Russian Lebedev, the American Wallace Carothers and the German scientist Hermann Staudinger led in 1931 to one of the first successful synthetic rubbers, known as neoprene, which was developed at DuPont under the direction of E. K. Bolton. Neoprene is highly resistant to heat and chemicals such as oil and gasoline, and is used in fuel hoses and as an insulating material in machinery. The company Thiokol applied their name to a competing type of rubber based on ethylene dichloride.[4]
In 1935,
World War II
Production of synthetic rubber in the United States expanded greatly during
Types
The most prevalent synthetic rubber is
- polyisoprene, prepared by polymerization of isoprene
- 2-chlorobutadiene
- 2-propenenitrileand butadiene
Many variations of these can be prepared with mixtures of monomers and with various catalysts that allow for control of
Silicone rubber
Silicone rubber is also a synthetic elastomer composed of silicone polymers. Silicone rubbers are widely used in industry, and there are multiple formulations. Silicone rubbers are often one- or two-part polymers, and may contain fillers to improve properties or reduce cost. Silicone rubber is generally non-reactive, stable, and resistant to extreme environments and temperatures.
Natural vs. synthetic rubber
Natural rubber, coming from latex of Hevea brasiliensis, is mainly poly-cis-isoprene.
Synthetic rubber, like other polymers, is made from various petroleum-based monomers.
Some synthetic rubbers are less sensitive to
A new class of synthetic rubber is the
References
- ISBN 978-3527306732.
- LANXESS AG: 20
- ^ Michalovic, Mark (2000). "Destination Germany: A Poor Substitute". The Story of Rubber.
- ISBN 0-8247-0383-9. Retrieved 8 February 2015.
- ^ Current Biography 1940, "SEMON, WALDO LONSBURY" pp. 723–724
- ISBN 0788136461.
- )
- ^ Gurney, Gene (1962), The War in the Air: a pictorial history of World War II Air Forces in combat, New York: Bonanza Books, p. 215
- ^ "Army Air Forces in World War II". February 11, 2009. Archived from the original on 11 February 2009.
- ^ Williamson, Charles C. (5 March 1944), Plan for Completion of Combined Bomber Offensive (Appendices C & F), Hughes, R. D.; Cabell, C. P.;Nazarro, J. J.; Bender, F. P.; & Crigglesworth, W. J., Dwight D. Eisenhower Presidential Library: SMITH, WALTER BEDELL: Collection of World War II Documents, 1941–1945; Box No.: 48: HQ, U.S.S.T.A.F,
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: CS1 maint: location (link) - ISBN 978-0060825812.
- ISBN 978-0313246340.
- ISBN 978-3527306732.