Authors: H. N. M. Ekramul Mahmud, Anuar Kassim
Affiliations: Department of Chemistry, Faculty of Science, UM 50603 Kuala Lumpur, Department of Chemistry, Faculty of Science and Environmental Studies, UPM 43400 Serdang, Malaysia
Emails: [email protected]
Journal: International Journal of Fundamental Physical Sciences (IJFPS)
Volume: 1, Issue: 1, Pages: 28-33, Date: March, 2011
ISSN: 2231-8186
DOI: https://doi.org/10.14331/ijfps.2011.330007
Polypyrrole-poly(vinyl alcohol) (PPy-PVA) conducting polymer composite films were prepared on Indium Tin Oxide (ITO) glass electrode from an aqueous solution containing pyrrole monomer, p-toluenesulfonate electrolyte and poly(vinyl alcohol) insulating polymer by electrochemical method. The prepared composite films were characterized by conductivity and electromagnetic interference (EMI) shielding measurements, dynamic mechanical analysis (DMA) and optical microscopy. The conductivity data of PPy-PVA shows that with the increase in PVA concentration in aqueous pyrrole solution used to prepare the films, the conductivity of the prepared PPy-PVA composite films increased up to a certain level and later it showed a decreasing trend. DMA shows enhanced mechanical properties over PPy alone, and optical micrographs revealed morphological changes. EMI shielding effectiveness of 45.67 dB was observed.
Polypyrrole, Polyvinyl alcohol, conducting polymer, electrochemical polymerization, dynamic mechanical analysis