Chemical and Electrochemical Synthesis of Polyvinyl Propionate Graft Polyaniline

In this work, we have synthesized poly vinyl(alcohol-co-3-chloropropionate), (PVA-coPV3CPr) by reaction between 3-chloropropionic acid and polyvinyl alcohol (PVA) in presence dicyclohexyl carbodiimide (DCCI) and (dimethylamino)pyridine (DMAP). Then 1,4-phenylene diamine was added and poly[vinylpropionate-co-3-(N-p-aminoaniline) propionate], (PVPr-co-P3NPAAPr) was prepared. This polymer dissolved in solution of chloroform/toluene containing polyvinylpyrolidone. Then sufficient fresh aniline was added to the solution and stirred at temperature O-SoC. To continue, we added solution of ammonium persulphate, p-toluenesuphonic acid in water drop by drop by a dropping funnel. The solution was diluted with warm DMF and filtered under vacuum and then precipitated to ice methanol and produced polyvinylpropionate-graft-polyaniline, (PVPr-g-PANi). This polymer was doped in NMP or warm DMF solution with camphorsulphonic acid (CSA), p-toluenesulphonic acid (PTSA), dodecylbenzene sulphonic acid (OSSA) or methansulphonic acid (MSA) and then produced their films by casting method. The electrical conducting charges versus dopants concentration, doping time and doping temperature were determined. Electropolymerization carried out by coating (PVPr-coP3NPAAPr) on surface GC disk electrode, then grew graft copolymer (PVPr-g-PANi) in presence of fresh aniline and acidic solution. Electrical conductivity of copolymer have been studied by a four-probe method and conductivity of 4.6 x 10-2 S/cm was achieved.