Elsevier

Synthetic Metals

Volume 74, Issue 3, October 1995, Pages 197-199
Synthetic Metals

Conducting blends of soluble polyurethane and poly(o-methoxyaniline)

https://doi.org/10.1016/0379-6779(95)03374-SGet rights and content

Abstract

Flexible, conducting and semicrystalline films were obtained by casting polyurethane (PU) and doped poly(o-methoxyaniline) (POMA) mixtures from N,N-dimethylformamide. Free-standing blend films showed an increase of conductivity from about 10−6 to 10−3 S/cm without additional doping as the POMA content in the blends increased from 5 to 65% (by weight). The crystalline structure of the homopolymers was investigated using wide-angle X-ray diffraction and was also compared with that of the blends by electron diffraction. Whereas the pure PU is completely amorphous, POMA is semicrystalline and crystalline regions in the blend were observed even for a PU-POMA 90:10 (by weight) composition. Morphology studies showed connected percolating pathways for blends with a POMA content from 10 to 65% (by weight).

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    Citation Excerpt :

    Blending POMA with different polymers therefore becomes promising, as these novel polymer blends could offer the possibility of combining synergistically the properties of each component, i.e. the conductivity and other functional properties of POMA and the mechanical property and processability of the thermoplastic matrix [6,7]. POMA has been solution blended with several polymer matrices, including polyvinylidene fluoride (PVDF) [8–11], poly(epichlorohydrin-co-ethylene oxide) [12], polyacrylonitrile [7], polyurethane [4,13], natural rubber [14], and poly(p-hydroxystyrene)-b-polyisoprene [15]. However, to the best of our knowledge, there has been no report about melt blending of POMA with a thermoplastic matrix, even though melt processing is more favourable from the industrial point of view [2], as it avoids any solvent usage which may limit the technological use and is steadily being spotlighted as environmentally detrimental [16,17].

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