Table of Contents
ISRN Nanomaterials
Volume 2012, Article ID 809063, 6 pages
http://dx.doi.org/10.5402/2012/809063
Research Article

Effect of Polyvinyl Alcohol on the Growth, Structure, Morphology, and Electrical Conductivity of Polypyrrole Nanoparticles Synthesized via Microemulsion Polymerization

1Department of Applied Chemistry and Polymer Technology, Delhi Technological University, Bawana Road, New Delhi 110042, India
2National Physical Laboratory, Council of Scientific and Industrial Research, Dr. K. S. Krishnan Marg, New Delhi 110012, India

Received 6 July 2012; Accepted 27 August 2012

Academic Editors: A. Kajbafvala, B. Panchapakesan, A. Sorrentino, and C. Wang

Copyright © 2012 Anurag Krishna et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Polypyrrole (PPy) nanoparticles were synthesized via microemulsion polymerization technique using sodium dodecyl sulfate as surfactant. Polyvinyl alcohol (PVA) was added as soft template during polymerization to modify the structure and properties of PPy nanoparticles. The synthesized materials namely, PVA-free and PVA added were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and DC electrical conductivity measurements. The sample synthesized in the presence of PVA has longer conjugation length as estimated from FT-IR investigation. Temperature dependence (4.2–300 K) of DC electrical conductivity measurement reveals that the PVA has a strong effect on the polymerization mechanism of PPy giving evidence of H-bonded assistance during polymerization leading to the synthesis of better ordered polymer. A growth mechanism has been proposed which explains the H-bonded assistance of PPy polymerization leading to enhanced structural ordering.