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Because new technology using ionic liquids (ILs) for cellulose processing enables the spinning of cellulose with various techniques, the resulting fiber property profiles differ significantly, depending on the process parameters. ILs are thermally stable, nontoxic, environmentally friendly solvents and dissolve cellulose directly; this leads to a high flexibility in the complete process chain for man‐made cellulosics. A comparison of the manufacture of cellulosic fibers according to the Lyocell process and by means of ILs is presented. The rheological behavior of the spinning dopes, the structures, and the physical textile properties of the prepared fibers were determined. The fibers spun from solutions of cellulose in N‐methyl morpholin‐N‐oxide monohydrate, 1‐ethyl‐3‐methyl imidazolium acetate, and 1‐ethyl‐3‐methyl imidazolium diethyl phosphate were compared. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Aus Säureamid‐Phosphoroxychlorid‐Komplexen und Aminen werden Amidine hergestellt. N.N′‐Substituierte Harnstoffe und Amine ergeben in Gegenwart von Phosphoroxychlorid Guanidine. Aus Amidchloriden und Alkoholaten lassen sich Amidacetale gewinnen. Lactame erleiden in Gegenwart von Phosphoroxychlorid eine Selbstkondensation. Verbindungen mit aktiver Methylengruppe setzen sich mit Säureamid‐Phosphoroxychlorid‐Addukten zu Aminomethylen‐Verbindungen um.

Combinations of cellulosic fibers (cotton, viscose) with man‐made chemical fibers (polyesters, polyamides, or polyacrylonitrile) are common as composites in textile fabrics. In this work the preparation of cellulose/polymer blend fibers in ILs is described. Cellulose is solved in ILs with other fiber polymers such as polyamides or PAN and processed to fiber blends by wet spinning. The rheology of spinning dopes, structural parameters, and physical textile properties of the prepared fibers are determined. TGA indicates a significant increase of carbon yield of the cellulose fibers blended with m‐aramide and PAN, respectively.

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