Authors Hegewald, J. ; Pionteck, J. ; Jakisch, L. ; Voit, B.
Title Electrically conducting polypyrroles as multifunctional coupling agents in heterogeneous polymer blends
Date 16.04.2008
Number 16072
Abstract 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.
Publisher Polymer Preprints
Citation Polymer Preprints 49 (2008) 326 - 327

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