Stretch Orientation of Poly 3-Alkylthiophenes

FIGURE 23. Inhared spectra of a stretched, free-standing film of P30T for light polarized with the electric vector parallel (E ) and perpendicular (Ej ) to the stretch direction. 

The degree of orientation in the stretched P3ATs can be expressed by Hermans orientation function, which is defined as [108]  

FIGURE 24. Azimuthal scan of the low angle peak (20=4.4 °) in the diffiractogram of P30T [40]. 

FIGURE 25. The 1510 cm infra-red absorption band (C=C stretch) of a stretched P30T/PE structure for Hght polarized parallel (A ) and perpendicular (Aj ) to the stretch direction [107]. 

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