Fosforylowane żywice fenolowe

M. Kędzierski; Z. Florjańczyk

Published : 2022-09-19

Vol. 46 No. 7-8 (2001)

Phosphorylated phenolic resins

M. Kędzierski Z. Florjańczyk

Abstract

Phosphorylated phenol-formaldehyde (PP) resins were synthesized by melt polycondensation of monophenyl phosphate and formaldehyde (added as trioxane). The structure and the degree of polycondensation of the PP resins were examined by 'H, 13C and 31P NMR spectroscopy and by FAB mass spectrometry. Upon esterification, the reactivity of the phenolic ring fell, a fact interpreted in terms of the correlation between the reactivity of phenols toward formaldehyde and the I3C NMR spectral data. The ionic conductivity of aqueous solutions of PP resins was measured and the resistance to hydrolysis (followed by 31P NMR) of soluble non-crosslinked PP resins (degree of polycondensation (DP), 3-7) was examined. The PP resins became crosslinked with formaldehyde at room temperature in the presence of sulfuric acid. Curing conditions were found to affect the crosslinking density (expressed by equilibrium swelling ratio); the total ion-exchange capacities of the crosslinked products were 8.6-8.96 meq/g (Table 2).

Keywords

monoester fenylowy kwasu fosforowego ; polikondensacja z formaldehydem ; reaktywność ; fosforylowane żywią fenolowe ; odporność na hydrolizę ; sieciowanie ; zdolność wymienna monophenyl phosphate ; polycondensation with formaldehyde ; reactivity ; phosphorylated phenolic resins ; resistance to hydrolysis ; crosslinking ; ion-exchange capacity

Phosphorylated phenolic resins

Abstract

Keywords

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