Word: polymerized
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Dates: during 1930-1939
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At the Pittsburgh meeting of the American Chemical Society last September, Dr. Harry Robert Dittmar of the du Pont Research Laboratories described "Pontalite," a new plastic known chemically as methyl methacrylate polymer, as clear as optical glass, only half as heavy as common glass, flexible, non-shattering (TIME, Sept. 21...
"Pontalite" is a new plastic, known chemically as methyl methacrylate polymer, which is as clear as optical glass, only half as heavy as common glass, flexible, non-shattering, able to withstand tensions of over four tons per square inch. It can be sawed, cut, drilled, polished, cast into molds. "The...
...mono-vinylacetylene. They treated it with hydrogen chloride and first thing they knew they had a fine pot of chloroprene. Chloroprene differs from rubber's polymer, isoprene, only in that a chlorine atom replaces the methyl group, so after that the going was fairly easy. They had only to polymerize the chloroprene to the right point, and all of them were experienced polymerizers. When they finished they put a piece of their rubber into a bottle of kerosene, left it 72 hr. When it came out it was still rubber, retained more than half its original strength. (A piece...