ISSN:
0449-296X
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Redox polyelectrolytes are described where the polyphenols hydroquinone, pyrogallol, and catechol were absorbed as counterions by a strong base anion-exchange resin in the hydroxide form, and then polymerized by refluxing in 1:1 mole ratio with formaldehyde in aqueous solution, thus producing a “snake-cage” configuration. The redox capacities of the resins were determined by oxidation with iodine/iodide solution, and found to approach theoretical at between 5.1 and 5.4 meq/g. The rate of oxidation was found to be controlled by diffusion within the particles. Fe3+ was unsatisfactory as an oxidant, owing to the exclusion effect by the fixed positive charges in the resin matrix. At low pH the resin beads were light to reddish brown in the reduced form, black in the oxidized form. The resins, especially that based on catechol, showed much greater stability in 1N NaOH solution than simple polyphenol-formaldehyde condensation polymers.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1971.150091016
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