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 been investigated, and it was possible to transform quantitatively carboxy into hydroxymethyl groups, without hydrogenolytic reactions affecting the main chain of the polymer. The obtained polymer was characterized by chemical titration, viscometry, i.r., NMR and DSC.
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|Titolo:||SYNTHESIS OF HYDROXYLATED SEGMENTED POLYURETHANES|
|Data di pubblicazione:||1992|
|Appartiene alla tipologia:||01a Articolo in rivista|