Abstract
The synthesis, thermal, and conduction properties of blends prepared from poly(4-vinyl-imidazole), P-4VI, and phosphoric acid are reported. The number of moles of phosphoric acid per polymer repeat unit,
x, was varied from 0≤
x≤2. These blends can be cast into homogeneous films. Thermogravimetric analysis (TGA) illustrates that these blends are chemically stable up to about 150°C. Differential scanning calorimetry (DSC) shows that the softening temperature of the blends decrease from 77°C for
x=1 to −8°C for
x=2. The DC conductivity increases with
x and reaches ∼10
−4 S/cm for
x=2 at ambient temperature.