Sucrose-based polymers: Polyurethanes with sucrose in the main chain
1997; Elsevier BV; Volume: 33; Issue: 10-12 Linguagem: Inglês
10.1016/s0014-3057(97)00056-6
ISSN1873-1945
AutoresDhanjay Jhurry, Alain Deffieux,
Tópico(s)Carbohydrate Chemistry and Synthesis
ResumoPolyurethanes derived from diisocyanates and sucrose containing either blocked or free hydroxyl groups were synthesized by polycondensation and their dimensions and structures characterized. It was shown that under certain conditions, crosslinking can be avoided and polycondensates based on sucrose-free hydroxyl groups that are soluble both in polar organic solvents and in water can be obtained. However, analysis of their 13C NMR spectra shows that addition does not proceed selectively at hydroxyls 6 and 6′ as we might expect, thus suggesting that the polyurethanes do not possess linear structures. This was confirmed by carrying out the step-growth addition of 6,6′-dichlorosucrose on 1,4-phenylene diisocyanate.
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