Abstract
Anhydrous proton conducting polymer electrolytes have been prepared by entrapping imidazol (Im) in polyacrylic acid (PAA) with various stoichiometric ratios,
x, to form PAA
xIm (
x is the number of moles of Im per polymer repeat unit). Polymer electrolytes, PAA
xIm (with
x=0.5 and 1) can be cast into transparent, homogeneous films. FT-IR results indicate the protonation of imidazol. Thermogravimetric analysis (TG) illustrates that these blends are chemically stable up to about 160
°C. Differential scanning calorimetry (DSC) shows that glass transition temperature decrease from 57
°C for
x=0.5 to 35
°C for
x=1. The dc conductivity increases with
x and temperature reaching ∼10
−3
S/cm for
x=1 at 120
°C.