Broadband dielectric spectroscopy revealed a plateau in the real part of the conductivity (σ′) above 10 kHz. At 80 °C, σ_ion = 3.1 × 10⁻³ S cm⁻¹ (activation energy E_a ≈ 0.18 eV). The frequency‑independent region widened with temperature, indicating a Vogel–Fulcher–Tammann (VFT) behavior typical for ion‑conducting polymers.
revealed a monomodal distribution with Mₙ = 28 kDa and Đ = 1.15, reflecting the controlled polymerization and minimal chain scission during ion‑exchange steps. IPZZ-266