2024 Volume 45 Issue 3 Pages 143-
To achieve high-speed and low-loss signal communication and processing, low dielectric insulating materials have attracted much attention. In this study, the dielectric properties of an aromatic poly(thioether) containing triphenylphosphine sulfide moieties were investigated. Its dielectric constant (ε) and dielectric dissipation factor (tanδ) are 3.15 and 0.0045, respectively, which are lower than those of the corresponding P = O group-containing poly(thioether) (ε = 3.29 and tanδ= 0.0065). These results are probably due to the less polar nature of the P = S group compared to the P = O group, which reduces the atomic/orientational polarization components. On the other hand, the dielectric properties of the P = S groupcontaining poly(thioether) are higher than those of the P = S group-containing poly(ether) (ε = 2.99 and tanδ = 0.0038) because the thioether moieties have a larger electron polarization component compared to the ether moieties.
