An effective strategy for the preparation of intrinsic low-kand ultralow-loss dielectric polysiloxanes at high frequency by introducing trifluoromethyl groups into the polymers

Two new CF₃-containing polysiloxanes with low dielectric constant (D_k) and dielectric loss (D_f) at a high frequency of 5 GHz were reported. The sample with two −CF₃groups exhibits better dielectric properties withD_kof 2.53 and ultralowD_fof 1.66 × 10⁻³.