Premium
Dielectric behaviour of polycarbonate/poly(styrene‐ co ‐acrylonitrile) and polycarbonate/poly(methyl methacrylate) two‐phase blends
Author(s) -
Ilavský Michal,
Sokol Radek,
Nedbal Jan,
Fähnrich Jaromír,
Kolařík Jan
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<79::aid-masy79>3.0.co;2-v
Subject(s) - polycarbonate , miscibility , materials science , dielectric , methyl methacrylate , acrylonitrile , styrene , polymer chemistry , phase (matter) , conductivity , dipole , permittivity , composite material , polymer , chemistry , organic chemistry , copolymer , optoelectronics
Frequency and temperature dependencies of the complex permittivity ϵ* were investigated for two‐phase blends polycarbonate/poly(styrene‐ co ‐acrylonitrile) (PC/SAN) and PC/poly(methyl methacrylate). The frequency dependencies of the ϵs* at all temperatures were described by the Havriliak‐Negami (HN) equation and the conductivity contribution. The effect of mutual miscibility on the HN shape parameters and temperature dependencies of the peak frequences f m (at which loss component ϵ″ attains its maximum value) is discussed. The Böttcher equation is used for describing the effect of the blend composition on the reduced dielectric strength ΔϵT, the dipole moment μ and ϵ* values measured at the highest temperatures (in the conductivity region). The role of Maxwell‐Wagner‐Sillars polarization due to interfaces between ordered and disordered domains in PC is mentioned.