Abstract
The synthesis, thermal and conduction properties of blends of poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPSA) with imidazol (Im) are reported. PAMPSA–
xIm blends were prepared for 0.5≤
x≤2, where
x was the number of moles of imidazol per polymer repeat unit. These blends can be cast into homogeneous films. The protonation of imidazol was demonstrated by FT-IR studies. Thermogravimetric analysis (TG) illustrated that these blends are chemically stable up to about 180
°C. Differential scanning calorimetry (DSC) shows that the softening temperature of the blends decreases from 87
°C for
x=0.5 to −25
°C for
x=2. The alternating current (ac) conductivities of the samples were measured via impedance spectroscopy. The direct current (dc) conductivity increases with
x and temperature reaching 1.45×10
−3
S/cm for
x=2 at 100
°C.