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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 8
BKCSDE 32(8)
August 20, 2011 

Effect of Structural and Morphological Changes on the Conductivity of Stretched PANI-DBSA/HIPS Film
Jonghyeok Lee, Eunok Kim *
Polyaniline, PANI-DBSA/HIPS, Stretch orientation, Morphology
We studied the effect of structural and morphological changes on the conductivity of a stretched conducting polymer film. To improve the poor processability of polyaniline, we used dodecylbenzenesulfonic acid as both a surfactant and a dopant during emulsion polymerization, followed by blending with high-impact polystyrene. UV-Vis/NIR spectra were obtained to observe conformational changes, and SEM and AFM were used to investigate morphological changes. FT-IR dichroism was applied to determine the microscopic orientation, and XRD patterns were obtained for quantitative crystallinity analysis. The electrical conductivity (σ⎟⎜/σ⊥) was measured as a function of draw ratio. We found a clear correlation between morphological changes and σ⎟⎜/σ⊥, especially at the stretching limit. The conductivity of the films can be modified according to the desired application by controlling their structure and morphology.
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