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Authors
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Hegewald, J. ; Pionteck, J. ; Jakisch, L. ; Voit, B.
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Title
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Electrically conducting polypyrroles as multifunctional coupling agents in heterogeneous polymer blends
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Date
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16.04.2008
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Number
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16072
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Abstract
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POLY 63 - Functional Nanomaterials from New Polymer Synthetic Methodologies<br /><br />A novel approach will be presented using nanometer sized electrically conducting polypyrrole particles not only to induce conductivity to a polymer blend but also to improve its mechanical properties by interfacial compatibilization. A model blend system was chosen, based on mono-amino terminated polystyrene and carboxylic acid endgroup functionalized poly(methyl methacrylate), synthesized by ATRP and RAFT, respectively. However, carboxylic acid and amine groups do not undergo a coupling reaction during melt mixing. This fact is utilized to incorporate electrically conducting polypyrroles, containing 1,3-oxazoline and 1,3-oxazinone moieties, which selectively react with carboxylic acid and amino groups, respectively. Thus polypyrrole locates selectively at the interface, building up percolation paths. On condition of a co-continuous morphology an electrically conductive bulk material is obtained with a reduced threshold concentration. The challenge is to fit size and reactivity of the polypyrroles to the domain size of the blend, so that it can act effectively as interfacial modifier.
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Publisher
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Polymer Preprints
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Wikidata
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Citation
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Polymer Preprints 49 (2008) 326 - 327
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DOI
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http://oasys2.confex.com/acs/235nm/techprogram/P1148321.HTM
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