Polyaniline (PANI) zeolite composites have been prepared by oxidative polymerization of anilinein the presence
of zeolite 13X, producing composite materials with PANI/zeolite weight ratios from about 0.5 to 55. The DC
conductivity of the composite materials decreased exponentially with zeolite weight fraction. Pure PANI was
paramagnetic while the PANI/zeolite complexes with weight ratios larger than 20 showed an appreciable
antiferromagnetic component as indicated by temperature dependence of their electron spin resonance spectra.
This novel antiferromagnetism is speculated to arise from π-dimer pairing of PANI chain layers stacking on
the zeolite particle surface.
Electrically conductive semi-IPNs based on polyaniline and crosslinked polyvinylacetate were prepared. Polyaniline successfully percolated through the crosslinked PVAc networks and the resulting semi-IPNs show a continuous network morphology. The conductivity of the semi-IPN increases with increasing content of polyaniline and increasing acidity used during the polymerization of the polyaniline. The conductivity of the semi-IPN is 0.13 S/cm, with the highest polyaniline content of 19.3 wt %. The depression of polyaniline with temperature change is smallest followed by the depression of semi-IPN of the polyaniline/crosslinked polyvinylacetate, which is considerably smaller than the depression of crosslinked polyvinylacetate.
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