0185196 - UJF-V 20000370 RIV DE eng J - Článek v odborném periodiku
Švorčík, V. - Ekrt, O. - Rybka, V. - Lipták, J. - Hnatowicz, Vladimír
Permittivity of polyethylene and polyethyleneterephtalate.
Journal of Materials Science Letters. Roč. 19, - (2000), s. 1843-1845. ISSN 0261-8028
Grant CEP: GA ČR GA203/99/1626; GA AV ČR KSK1048601
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 0.496, rok: 2000

Capacitance measurement is an efficient tool for studying the dielectric properties of polymeric films. The dielectricproperties of polymers are effected by several factors,e.g.molecular chain arrangement, amorphous and crystalline phase fraction, tacticity, molecular weight distribution, temperature and measuring frequency. The dielectric response of polymers to external electric field depends mainly on its polarity. While in unpolar polymers only induced (electron or ion) polarizations play a role, in polar ones orientationaldipole polarization contributes to the observed effects too. The relative permittivity î.sup.r determined from capacitance measurements characterizes the dielectric propertiesof polymers.
Trvalý link: http://hdl.handle.net/11104/0081607