A far-infrared study of ionic interactions in ionomers based on styrene-acrylic acid copolymers obtained by copolymerization in emulsion—II

✍ Scribed by Kazimiera Suchocka-Gałaś

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 453 KB
• Volume: 31
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(94)00161-8

✦ Synopsis

The far-k. spectra of films of ionomers based on styrene-acrylic acid copolymers obtained by copolymerization in emulsion in the 8&450 cm-' region have been studied. For each ionomer, an intense and broad absorption band, whose frequency is cation mass dependent has been observed and assigned to cation-motion in the electrostatic field of the anionic carboxylate groups. The force field elements for cations vibrating at carboxylate-containing sites have been obtained for different models of the cation-motion vibration. The results indicate that the postulated models for a vibrating assembly are reasonably good and the electrostatic ion-multipole treatment of the interactions is correct. The results indicate also the presence of cations in several environments in these ionomers and the formation of ionic group aggregates-multiplets and clusters.