Wallace Carothers was an American chemist and pioneer in pure research into large-molecular weight polymers.
Head of organic pure research at Dupont Experimental Station, 1928 - 1937.
Carothers equation, relating the average degree of polymerization to the yield (fractional conversion) of monomer into polymer.
Devlopment of superpolyesters, with molecular weights greater than 12000, allowing the molten polymer to be turned into fiber strings.
Polyamides: substituting diamines for glycols in polyester resulted in polyamide, a more stable polymer with commercial potential.
Nylon: polyamide 6-6, discovered from Carother's pioneering work on linear super-polymers.
Neoprene: the first synthetic rubber, was discovered by Carothers and his DuPont team in 1930
Despite professional success, including the discoveries of neoprene, the world's first synthetic rubber, and nylon, Carothers suffered from depression, and committed suicide.
(Biographies of famous scientists no. 53)
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1792 - 1871
John Herschel is the son of William Herschel, and the nephew of Caroline Herschel, two famous astronomers. He continued his father's work, publishing enhanced catalogues of astronomical objects, but was also prolific in many other fields of science and technology, notably as a pioneer of photography.
Growth is one of the stupidest purposes ever invented by any culture. We've got to have an enough. We have got to ask growth for what, and why, for whom, and who pays the cost, and how long can it last, and what's the cost to the planet, and how much is enough?
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