*2.3. Synthesis of Polypyrrole/Gum Arabic (PPy/GA) Composites*

PPy/GA composites were synthesized by inverse emulsion polymerization using monomer pyrrole and gum arabic (GA). The procedure was the same as for polypyrrole synthesis, except in composite production, different weight percent's of GA, such as 0.125%, 0.25%, 0.75% and 1% were added before the addition of benzoyl peroxide (BPO). To get the precipitate, the mixture was vigorously stirred for 24 h. To separate the pure product, the precipitate was washed three times with distilled water and 50 mL of acetone, then dried in an oven at 50 ◦C for 24 h. Table 1 shows the composition of PPy/GA composites and Scheme 1 shows the structural representation of the reactants.

**Table 1.** The designation and composition of the PPy/GA composites.


**Scheme 1.** Structural representation of reactants, i.e., polypyrrole and gum arabic.
