Investigation of Functional Carboxy-Containing Oligomers by IR and NMR Spectroscopy

Abstract

New functional oligomers have been synthesized via intereaction of epoxy oligomers with carboxylic ones or with dibasic carboxy acids. In some cases synthesis was accompanied by ROP-polymerization of DGEBA, initiated by carboxylic oligomer. The structure of obtained products was investigated by IR, 1 Н and 13 C NMR spectroscopy.

Synthesis Mechanism and Properties of Epoxy Resins Modified with Adipic Acid

“…When epoxides are modified with dibasic acids of aliphatic and aromatic types, the products with free epoxy and carboxy groups are obtained [14][15][16]. The structure of the synthesized oligomers is confirmed by a spectral analysis [17], and they may be used as binders to produce products based on epoxy-oligoesteric mixtures [15]. The catalysts proposed for the reaction between epoxide oligomer and dibasic acid are benzyltriethylammonium chloride (BTEACh), 1,4-diazobicyclo[2,2,2]octane (DABCO), N,N-dimethylaminopyridine (DMAP), 18-Crown-6, potassium hydroxide (KOH), triethylamine (TEA), zinc chloride (ZnCl 2 ) and a catalytic system consisting of 18-Crown-6 + ZnCl 2 [14,16].…”