Cresol and benzaldehyde oligomers have been condensed in organic solvents with oxalic acid as catalyst. The influence of some reaction factors such as the mole ratio between initial monomers, reaction medium and duration of the polycondensation on the yield, softening temperature, content of free cresol and molecular weight characteristics of the cresol-benzaldehyde oligomers is described in the present paper. The products obtained were investigated by means of i.r. and n.m.r, spectroscopy. On the.basis of the data obtained a mechanism for the interaction between cresol and benzaldehyde and a probable structure of the oligomers are proposed.
Посилання на статтю:
Synthesis and characterization of cresol-benzaldehyde oligomers / VI. Dimitrov // Polymer. – 1992. – Vol 33. – P. 1543-1547.