Dielectric response of polyampholytes with different structuresстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Местоположение издательства:Road Town, United Kingdom
Первая страница:379
Последняя страница:383
Аннотация:Temperature and frequency dependences of dielectric characteristics of polyampholytes prepared by drying of hydrogels based on sodium polymethacry late and poly(diallyldimethylammonium chloride) were investigated. Measurements were performed using samples with statistical and alternating sequences of monomer units in the temperature range 0-60degreesC and in the frequency range from 10 Hz to 10 kHz. For both samples, temperature dependences of the dielectric constant epsilon' and dc conductivity show anomalies in the range 30-50degreesC which possibly reflects a change in the structure of bound water occurring in polyampholytes. The frequency spectra of epsilon' indicate that the statistical polyampholyte contains larger water inclusions, which can be explained by different structures of multiplets formed by oppositely charged network groups.