Postpolymerization alignment of bulk conjugated polymers

Wilson, Tiffany M. S.; Chinn, Douglas A.; Robinson, David B.; Doty, F. P.
October 2008
Applied Physics Letters;10/6/2008, Vol. 93 Issue 14, p143304
Academic Journal
We have demonstrated postpolymerization stretch alignment of substituted conjugated polymers as evidenced by polarized infrared spectroscopy, with a Hermans orientation function value of 0.66 for a stretch ratio of 3.7. The effects of stretch rate and substrate on the material order are examined. We further show that the stretch-induced increase in long-range order leads to an increase in photoconductive response parallel to the stretch direction, and a decrease in the orthogonal direction. The introduction of small amounts of substituted fullerenes does not interfere with the ordering of the polymer on a bulk scale.


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