…A synthetic rubber obtained by cationic copolymerization of isobutylene and a small amount of isoprene at an extremely low temperature of -100°C using aluminum chloride as a catalyst. It is also called isobutylene-isoprene rubber (abbreviated as IIR). The isoprene content in butyl rubber is 0.6 to 3 mol%, which introduces carbon-carbon double bonds into the rubber molecular chain and enables sulfur vulcanization. … *Some of the terminology explanations that mention "IIR" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…イソブチレンと少量のイソプレンを,塩化アルミニウムを触媒として-100℃というきわめて低い温度でカチオン共重合させて得られる合成ゴム。イソブチレン・イソプレンゴムisobtylene‐isoprene rubber(略称IIR)ともいう。ブチルゴム中のイソプレン含有率は0.6~3モル%で,これによってゴム分子鎖内に炭素‐炭素二重結合を導入し硫黄加硫を可能にしている。… ※「IIR」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 |
…It was lined with light blue cotton and had an i...
The coastline stretches from Samekado in Hachinoh...
...the space above a state's territory and te...
<br /> A hill made of 107m above sea level, ...
...In other words, what explains the formation an...
A former town in Miyoshi County in the northwest o...
…A rock cave dug into a mountainside in medieval ...
… After the defeat in the War of Independence (th...
…Especially during the 19th century German common...
In 583, the Western Turks became independent and ...
This refers to customs that exist in society in ge...
A city in the northeastern part of Switzerland, in...
〘noun〙① The common world as opposed to the private...
A snail shell of the family Muscidae (illustration...
…The sipahis who went to war were under the comma...