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Poly(methacrylic acid)‐bound dihydroxybenzene units: Redox polymers
Author(s) -
Moulay Saād,
Mehdaoui Razika
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23002
Subject(s) - hydroquinone , catechol , poly(methacrylic acid) , methacrylic acid , chemistry , redox , potentiometric titration , benzoquinone , polymer chemistry , titration , surface modification , polymer , inorganic chemistry , organic chemistry , copolymer , ion
Poly(methacrylic acid) (PMAA) was functionalized with a hydroquinone/catechol under the reaction conditions of Minisci. Optimum conditions for maximum functionalization (52%) were found to be as follows: [benzoquinone]/[PMAA] ratio, 0.75; reaction time, 3 h; temperature, 75°C; and a nitrogen atmosphere. Redox properties of hydroquinone/catechol‐modified PMAA (PMAA‐HQ) were evaluated by their midpotentials potentiometrically estimated to be 898 mV at 20°C. At 35°C, a two‐stage oxidation was observed with a midpotential of 1000 mV. These midpotentials were found to be higher than those of hydroquinone, catechol, and a 1 : 1 hydroquinone‐catechol mixture, under the same conditions of potentiometric titration. Under the modification reaction conditions, the modified PMAA underwent severe degradation. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 954–961, 2006