Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites

doi:10.1088/1674-1056/20/5/058102

Abstract Polyaniline(PANI)/Ag nanocomposites, synthesized by incorporation of separately prepared silver nanoparticles in 1-methyl-2-pyrrolidinone(NMP) solution of PANI, have been aged at the accelerated temperature of 120 ℃ to simulate a storage period of 2 years at 25 ℃. The accelerated ageing of these materials is done by using the activation energy calculated from data collected using heat flow calorimetry (HFC). The impedance spectroscopic studies of NMP plasticized aged nanocomposite films suggest a microphase separation into reduced and oxidized repeat units. There is crosslinking of the PANI films during ageing thereby obstructing the charge transfer between PANI chains and silver nanoparticles. As a result, the resistivity is increased.

Keywords: polyaniline Ag nanoparticles impedance spectroscopy ageing

Received: 19 October 2010
Revised: 14 December 2010
Accepted manuscript online:

PACS:	81.05.Qk	(Reinforced polymers and polymer-based composites)
	82.35.Np	(Nanoparticles in polymers)
	84.37.+q	(Measurements in electric variables (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.))

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Asma Binat Afzal and Muhammad Javed Akhtar Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites 2011 Chin. Phys. B 20 058102

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Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites

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