Characterization Studies on (Polypyrrole/Fe3O4 Polyurethane Nanocomposite Conductive films

Jyotsna Kiran, Mathad and Rao, RMVGK (2012) Characterization Studies on (Polypyrrole/Fe3O4 Polyurethane Nanocomposite Conductive films. Journal of Polymer Materials, 29 (1). pp. 127-136.

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Conductive composite films were prepared by dispersing in-house synthesized Polypyrrole/ Fe3O4 Nanocomposite (CPNCs) particles in a polyurethane (PU) matrix. These conductive films prepared with varied CPNC loadings (0-4% by weight) were spray coated onto a polyethylene substrate. The duly dried CPNC-PU films were variously characterized by a 4 probe electrical conductivity measurement technique, Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Vibrating Sample Magnetometer (VSM) and a Universal Testing Machine (UTM). Results showed that the conductivity of the virgin PU film increased remarkably from 8.234 X 10-13 S/cm to 7.413 X 100 S/cm in the 4% CPNC loaded PU composite film. FTIR analysis of the CPNC-PU films, showed a shift in the chemical peaks of the host polymer to higher wave numbers, revealing the influence of nanoparticles present in the host polymer. DSC and TGA analyses together clearly revealed increased thermal stability of the CPNC-PU films. VSM measurements showed increased saturated magnetization, Ms,with increased CPNC loading in the films. The tensile strength of the composite PU film however decreased by 15.48%, while the % strain increased by 164.74% at 4% CPNC loading.

Item Type: Article
Uncontrolled Keywords: (Polypyrrole/Fe3O4) - PU Nanocomposite coatings, electrical conductivity, thermal analysis, magnetic properties, mechanical properties.
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Ms Indrani V
Date Deposited: 26 Sep 2012 04:17
Last Modified: 26 Sep 2012 04:17

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