DIELECTRIC ANALYSIS OF POLYSTYRENE MICROCAPSULES USING SCANNING DIELECTRIC MICROSCOPE

Authors
Citation
K. Asami, DIELECTRIC ANALYSIS OF POLYSTYRENE MICROCAPSULES USING SCANNING DIELECTRIC MICROSCOPE, Colloid and polymer science, 276(4), 1998, pp. 373-378
Citations number
13
Categorie Soggetti
Polymer Sciences","Chemistry Physical
Journal title
ISSN journal
0303402X
Volume
276
Issue
4
Year of publication
1998
Pages
373 - 378
Database
ISI
SICI code
0303-402X(1998)276:4<373:DAOPMU>2.0.ZU;2-2
Abstract
A dielectric imaging technique with a scanning dielectric microscope w as applied to polystyrene microcapsules in an aqueous environment to s tudy the electrical properties of individual ones. The dielectric imag es obtained over a frequency range from 10 kHz to 10 MHz showed freque ncy dependence, which indicated dielectric dispersion (or relaxation) due to interfacial polarization or the build between the microcapsule shell and the aqueous phases. The dielectric dispersion was analyzed b ased on an equivalent electrical circuit model and a shell-sphere mode l in which a spherical core is covered with an insulating shell.