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Title: | Structure – directing effect of renewable resource based amphiphilic dopants on the formation of conducting polyaniline-clay nanocomposite |
Authors: | Sudha, J D Reena, V L |
Keywords: | Clay Conducting Dopant Micelle Nanocomposite Polyaniline Structure-directing agent |
Issue Date: | Aug-2007 |
Publisher: | Wiley-VCH Verlag GmbH |
Citation: | Macromolecular Symposia 254(1):274-283;Aug 2007 |
Abstract: | The structure-directing effect of two amphiphilic dopants on the nucleation and growth mechanism during the formation of micro/ nanostructured polyaniline (PANI) and polyaniline-clay nanocomposites (PANICNs) is described. PANIs and PANICNs were prepared by in-situ intercalative emulsion polymerization of aniline using the amphiphilic dopants, 3-pentadecyl phenyl phosphoric acid (3-PDPPA) and 3-pentadecyl phenol–4-sulphonic acid (3-PDPSA), derived from cashew nut shell liquid, a renewable resource. These molecules act as intercalating agents, dopants and also as structure-directing agents. X- ray diffraction (XRD) and scanning electron microscopic (SEM) studies revealed the formation of lamellar/fibrillar – network in PANI- PDPPA and cylinder/rod morphology in PANI-PDPSA. Experimental data reveal that fibrillar morphology arises from the heterogeneous nucleation followed by an indefinite growth mechanism. On the other hand rod-like structures are formed from the self-assembled rod-like micelle guided polymerization through homonucleation followed by an anisotropic growth mechanism. Electrical conductivity measurement revealed lower conductivities for PANICNs than that of PANIs. |
URI: | http://hdl.handle.net/123456789/70 |
Appears in Collections: | 2007 |
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