Krytox 157 FSH潤滑油在40°C時(shí)的粘度為703-1055 cSt。
Krytox 157 FSH潤滑油是杜邦系列Krytox-氟化油的功能化版本，用作表面活性劑。該官能團是位于聚六氟環(huán)氧丙烷末端氟亞甲基上的羧酸基團。Krytox 157 FSH有兩種相對較寬的分子量范圍，即低分子量和高分子量，具有以下典型特性。與其他Krytox氟化油一樣，Krytox-157 FSH不溶于大多數常見(jiàn)的有機溶劑。它也是不可燃的。當加熱到170°C（338°F）以上時(shí)發(fā)生脫羧反應，在200°C（392°F）時(shí)變得劇烈。形成的產(chǎn)品似乎是混合物，但主要是Krytox氟化油的氫端封版本。堿金屬鹽在水存在下的脫羧反應在較低的溫度下發(fā)生，產(chǎn)生的聚合物基本上是純聚合物，末端覆蓋有氫。
Krytox 157 FSH Oil has a Viscosity of 703-1055 cSt at 40°C.
Krytox 157 FSH Oil is a functionalized version of the DuPont series of Krytox fluorinated oils that acts as a surfactant. The functionality is a carboxylic acid group located on the terminal fluoromethylene group of poly(hexafluoropropylene oxide). Krytox 157 FSH is available in two relatively broad molecular weight ranges designated as low and high with the following typical properties. Like the other Krytox fluorinated oils, Krytox 157 FSH is insoluble in most common organic solvents. It is also nonflammable. Decarboxylation occurs on heating above about 170 °C (338 °F) and becomes vigorous at 200 °C (392 °F). The product formed appears to be a mixture, but is mainly a hydro-end-capped version of Krytox fluorinated oil. The decarboxylation of its alkali metal salts in the presence of water occurs at lower temperatures and yields essentially pure polymers end-capped with hydrogen.
