Proton-vacancy conducting polymers based on polyethylene oxide and sulfamide-type salts

✍ Scribed by V. De Zea Bermudez; M. Armand; C. Poinsignon; L. Abello; J.Y. Sanchez

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 564 KB
• Volume: 37
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(92)80120-b

✦ Synopsis

A novel basic proton conducting polymer (so-called proton-vacancy conducting polymer) based on a solvating polymer (PEO), a sulfamide-type salt and a doping agent (guanidine, proton-vacancy inducer) is presented. Three eutectics and three intermediate crystalline compounds are found in the phase diagram established for the P(EO),NH,SO,NHr system (where n = O/S stands as the ratio of monomer units per sulfamide molecule). Experimental data obtained for two different doping levels (represented as the ratio N/H of guanidine molecules added per proton extracted) indicate that conductivity is raised as more protons are extracted from sulfamide. At room temperature one of the doped samples exhibits lo-' R-r cm-'. A conduction mechanism is proposed. A new vibrational band, ir inactive and probably due to complexation effects, is seen at about 896 cm-' in the Raman spectra of some of the complexes studied in the absence of base. The NH, stretching Raman bands characteristic of the analysed complexes are evidenced.