“octamethylcyclotetrasiloxane”的英文意思_释义_用法

单词

octamethylcyclotetrasiloxane

释义

ˌoctaˈmethylˌcycloˌtetrasiˈloxane Chem.
[f. octa- + methyl + cyclo- + tetra- + siloxane.]
A colourless oily liquid that is a cyclic tetramer, [(CH₃)₂SiO]₄, and an intermediate in the manufacture of many silicones.
1946M. J. Hunter et al. in Jrnl. Amer. Chem. Soc. LXVIII. 361/1 When a few drops of concentrated sulfuric acid are added to a quantity, say 10 c.c., of octamethyl⁓cyclotetrasiloxane, [(CH₃)₂SiO]₄, there is no marked change in appearance or temperature.1962Barry & Beck in Stone & Graham Inorg. Polymers v. 216 The slow addition of dimethyldichlorosilane to excess water at 15 to 20°C yields a mixture consisting of 0·5% hexamethyl⁓cyclotrisiloxane (D₃), 42·0% octamethylcyclotetrasiloxane (D₄), 6·7% decamethylcyclopentasiloxane (D₅), [etc.].1970Encycl. Polymer Sci. & Technol. XII. 503 Almost all strong inorganic alkalis and most quaternary ammonium hydroxides and phosphonium hydroxides will polymerize octamethylcyclotetrasiloxane to a high-molecular-weight polymer.

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