Flexural-Torsional Photomechanical Responses in Azobenzene-Containing Crosslinked Polyimides.

The influence of a variety of factors on the photomechanical output of azo-CP2- xx systems is studied, primarily focusing on a sample with a higher crosslink density (30 mol%) and two new, structurally related crosslinked polyimides with modified backbone flexibility/rigidity. This work elucidates the strong coupling between geometrical considerations (reciprocal aspect ratio of cantilever) and the visualized mechanical response (e.g., flexural-torsional response of a cantilever). [ABSTRACT FROM AUTHOR]