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Hexamethylenediamine or hexane-1,6-diamine, is the organic compound with the formula H 2 N(CH 2) 6 NH 2. The molecule is a diamine , consisting of a hexamethylene hydrocarbon chain terminated with amine functional groups .
Nylon 66 is synthesized by polycondensation of hexamethylenediamine and adipic acid. Equivalent amounts of hexamethylenediamine and adipic acid are combined in water. In the original implementation, the resulting ammonium/carboxylate salt was isolated and then heated either in batches or continuously to induce polycondensation.
A commercial application of this technology includes the production of hexamethylenediamine from adiponitrile, a precursor to Nylon 66. [7] Depending on reaction conditions, reactive intermediate imines can also undergo attack by amine products to afford secondary and tertiary amines: 2 R-C≡N + 4 H 2 → (R-CH 2) 2 NH + NH 3
A diamine is an amine with exactly two amino groups.Diamines are used as monomers to prepare polyamides, polyimides, and polyureas.The term diamine refers mostly to primary diamines, as those are the most reactive.
The simplest case refers to the formation of a strictly linear polymer by the reaction (usually by condensation) of two monomers in equimolar quantities. An example is the synthesis of nylon-6,6 whose formula is [−NH−(CH 2) 6 −NH−CO−(CH 2) 4 −CO−] n from one mole of hexamethylenediamine, H 2 N(CH 2) 6 NH 2, and one mole of adipic acid, HOOC−(CH 2) 4 −COOH.
Hexamethylenediamine; Tetramethylethylenediamine (TMEDA or TEMED) This page was last edited on 5 November 2022, at 19:27 (UTC). Text is available under the Creative ...
English: Structural formula (2D skeletal) of the chemical compound 1,6-Diaminohexane (Hexamethylenediamine) Deutsch: Strukturformel (Skelettformel) der chemischen Verbindung 1,6-Diaminohexan ( Hexamethylendiamin )
2-Methylglutaronitrile is a by-product of the production of adiponitrile, the precursor of hexamethylenediamine and adipic acid as building blocks for nylon 66.. Starting from 1,3-butadiene or a butadiene-rich C4-section (> 40% by volume) from a naphtha steamcracker in the first stage a mixture of pentenenitriles is obtained through hydrocyanation (using as catalyst Ni 0-phosphine [PR 3] [2 ...