NMR SPECTROSCOPIC ANALYSIS OF THE STRUCTURE OF POLYMETHYLENENAPHTHALENESULFONIC ACID-MODIFIED POLYESTER RESIN
DOI:
https://doi.org/10.5281/Keywords:
polymethylenenaphthalenesulfonic acid, polydiethylene glycol adipinate, modified polyester resin, NMR spectroscopy, molecular structure, polymer modification, sulfo groups, physicochemical properties, polymer compositions.Abstract
The molecular structure of polymethylenenaphthalenesulfonic acid (PMNS)-modified polyester resin synthesized from polydiethylene glycol adipinate (PDAT) and PMNS at a molar ratio of 70:1 was investigated by ^1H and ^13C NMR spectroscopy. Characteristic signals of naphthalene rings, methylene bridges, adipinate fragments, and diethylene glycol units confirmed the formation of the expected oligomeric structure. The results demonstrated the successful incorporation of PMNS into the polyester matrix and the formation of a stable modified resin system.
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