Trifluoroacetylation has been successfully applied to polyamides in order to obtain polymers soluble in aprotic solvents; trifluoroacetylation of polyurethanes was reported to be much slower. In this work, the results of a study of the effect of trifluoroacetic anhydride/NH molar ratio, reaction tim
Thermodynamic characterization of segmented polyurethanes
β Scribed by Valery P. Privalko; Vassily P. Azarenkov; Alexander V. Baibak; Andrey A. Usenko
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 423 KB
- Volume
- 285
- Category
- Article
- ISSN
- 0040-6031
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The synthesis of a hydroxylated polyurethane, by reduction with diborane of the corresponding carboxylated polymer, is described. The starting polyurethane, of the segmented type, contains as chain extender dihydroxymethylpropionic acid. Various conditions for hydrogenation of the carboxy group have
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