In the present study, an attempt has been made to synthesize soluble PPy via inverse emulsion polymerization pathway using benzoyl peroxide as an oxidant and dodecylbenzenesulfonic acid (DBSA) as dopant as well as a surfactant. A mixture of chloroform and 2-butanol was used as dispersion medium for the first time. Pyrrole polymerized into PPy inside the micelle under these conditions. The influence of synthesis parameters such as amount of pyrrole, benzoyl peroxide (BPO) and DBSA on the percent yield and other properties of the resulting PPy was studied. The synthesized PPy was found to be completely soluble in DMSO, DMF, THF, chloroform and m-cresol etc. The structure of PPy and incorporation of DBSA in the polymer backbone was confirmed by FT-IR. UV-Vis spectra of PPy showed correspondence with the electrical conductivity of the prepared salts. SEM micrographs showed the typical granular morphology of PPy-DBSA. TGA and XRD of the prepared PPy samples were also studied and explained.

Salma Bilal, Mohammad Sohail and Anwar-ul-Haq Ali Shah