Fabrication and Characterization of Cellulose Microfibrils from Pandanus tectorius(Screw Pine) for Polymer Composite Application

Abstract

The addition of pyridinium chlorochromate during the electrochemical synthesis of polypyrrole (PPy) significantly accelerates the formation of insoluble polymer. The acceleration of electrochemical polymerization is due to chemical oligomerization of pyrrole by the oxidizing agent as well as the lower oxidation potential of the oligomer compared with the initial pyrrole. Compared with simple electrochemical synthesis the combined method of polypyrrole preparation produces a smaller amount of released gas which results in a doped polymer with a lower conductivity (ca. 10 S cm-1). The conductivity of polypyrrole prepared by chemical oxidation in the presence of pyridinium chlorochromate and tetraethylammonium tetrafluoroborate is about 109 times lower than the conductivity of PPy prepared by electrochemical reaction. ?? 1993.