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Dielectric spectroscopy study of poly(methacrylic acid) gels
Author(s) -
Sitnikova Natalia L.,
Philippova Olga E.,
Malyshkina Inna A.,
Gavrilova Nadejda D.,
Khokhlov Alexei R.
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200106)170:1<91::aid-masy91>3.0.co;2-1
Subject(s) - methacrylic acid , materials science , dielectric , spectroscopy , poly(methacrylic acid) , polymer chemistry , dielectric spectroscopy , polymer science , composite material , chemical engineering , analytical chemistry (journal) , chemistry , organic chemistry , polymer , copolymer , optoelectronics , engineering , physics , electrode , quantum mechanics , electrochemistry
It was shown that swelling behavior of polyelectrolyte gels is determined by the state of network counterions. In nonpolar media the ionomer regime of swelling behavior can be realized, this regime is characterized by the formation of ion pairs and ion multiplets. Dielectric spectroscopy and conductivity measurements of the charged poly(methacrylic acid) gels in media rather low polarity in the frequency range from 10 2 to 10 5 Hz were made in order to detect the appearance of ionic multiplets. Extremely high values of dielectric dispersion for both swollen in methanol and dried gels at low frequencies can be explained by aggregation of ion pairs into multiplets with high polarizability. The appearance of resonance peak on the dielectric spectra of the samples under the study gives evidence of the existence of ionic aggregates mainly of the same size.