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Conducting polystyrene/polyaniline blend through template-assisted emulsion polymerization

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Abstract

Electrically conducting polystyrene (PS)/polyaniline blends have been prepared through a one-step “anilinium-surfactant template”-assisted emulsion polymerization at room temperature. The self-assembled cylindrical An+PDPSA− micelle formed inside the PS matrix can act as a structure directing template cum dopant. Morphological observation under scanning electron microscopic studies revealed that during the progress of polymerization, the initially formed nanostructured conducting polyaniline was changed into cubic/hexagonal/lamellar particles and finally transformed into a percolated structure inside the PS matrix. Blend was further characterized by UV-Vis spectroscopy, FTIR spectroscopy, X-ray diffraction, electrical conductivity, thermal stability, dielectric property, rheological property, and electromagnetic shielding efficiency. The key finding of this work is that the conductive blend prepared through micelle-guided polymerization exhibited superior electrical conductivity (9.6 S/m) with low percolation threshold concentration (5 wt%), excellent thermal stability, electromagnetic interference (EMI) SE of 1–10 dB which makes it a promising candidate for EMI shielding and antistatic discharge matrix for the encapsulation of microelectronic devices.

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Acknowledgements

The authors are grateful to the Indian Space Research Organization for the financial support (GAP 109439) and Dr. B.C. Pai, Director of NIIST, TVM for the constant support and encouragement during this work. We are also thankful to Mr. M.R. Chandran, Mr. P. Guruswamy, NIIST Trivandrum, for SEM and XRD analysis.

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Authors and Affiliations

  1. Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Thiruvananthapuram, 695 019, India

    J. D. Sudha & S. Sivakala

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  1. J. D. Sudha
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  2. S. Sivakala
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Correspondence to J. D. Sudha.

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Sudha, J.D., Sivakala, S. Conducting polystyrene/polyaniline blend through template-assisted emulsion polymerization. Colloid Polym Sci 287, 1347–1354 (2009). https://doi.org/10.1007/s00396-009-2101-5

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  • DOI: https://doi.org/10.1007/s00396-009-2101-5

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