… Meanwhile, in the United States, DuPont's development of chloroprene rubber (CR) progressed, and by 1932 they were producing 250 tons. The industrialization of general-purpose synthetic rubber in the United States was delayed, but with the outbreak of World War II in 1939, imports of synthetic rubber from Germany stopped, and in 1941, in order to secure important rubber as a military supply when the United States entered the Pacific War, the US government began mass production through the Government Synthetic Rubber Program, which managed synthetic rubber in government control. In 1941, annual production was 8,000 tons, but by 1945, annual production had increased to an astonishing 820,000 tons. The synthetic rubber produced at this time was called GR (Government Rubber), and depending on the type, for example, copolymer rubber of styrene and butadiene was called GR-S, and copolymer rubber of acrylonitrile and butadiene was called GR-A, etc. … *Some of the terms mentioned in the "Government Synthetic Rubber Program" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 一方,アメリカにおいてはデュポン社におけるクロロプレンゴム(CR)の開発が進み,1932年には250tの生産が行われるようになった。アメリカにおける汎用合成ゴムの工業化は遅れていたが,39年第2次大戦の勃発とともにドイツからの合成ゴムの輸入がとまり,41年太平洋戦争への突入に至って軍需物資として重要なゴムを確保するため,アメリカ政府は〈合成ゴムの政府管理Government Synthetic Rubber Program〉による大量生産を行い,41年には年産8000tであったものが45年には年産82万tにも達するという驚異的な発展をとげた。このとき生産された合成ゴムはGR(Government Rubber)とよばれ,その種類によって,たとえばスチレンとブタジエンの共重合ゴムはGR‐S,アクリロニトリルとブタジエンの共重合ゴムはGR‐Aなどとよばれた。… ※「Government Synthetic Rubber Program」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
150-235 Roman historian of the Imperial period. Bo...
...Insects of this family are widely distributed ...
A collection of 11 volumes from the late Kamakura ...
⇒Sound Chemistry Source: About Shogakukan Digital ...
...Such practices are often found in primitive so...
A deciduous shrub of the legume family native to C...
Born: December 18, 1828, Jönköping Died: September...
…Soviet children's author. Real name: Golikov...
A town in Undeok County, North Hamgyong Province,...
These stones are said to have been sat on by gods,...
…[Hiroshi Aramata]. … *Some of the terminology th...
A former town in Kami County in northwest Miyagi P...
...Sea urchins mainly eat brown algae and calcare...
Also called mold sand. Sand used to make casting m...
The art of the Americas south of Mexico. Originall...