Molecular Engineering of Azobenzene-Functionalized Polyimides to Enhance Both Photomechanical Work and Motion (POSTPRINT)
Interim rept. 24 Dec 2009-27 Aug 2014
UES INC DAYTON OH
Pagination or Media Count:
Photomechanical effects in polymeric materials directly convert input photonic energy into a macroscopic mechanical output. The photoinitiated mechanical output of these materials is typically dominated by classical mechanics, primarily derived from the material stiffness and sample geometry. Accordingly, large magnitude shape change e.g., motion is typically traded for large magnitude force generation. Here, we report on the systematic preparation and comparison of photomechanical effects in a set of isomerically varied linear and cross-linked azobenzenefunctionalized materials that demonstrate the critical role of segmental mobility evident in the magnitude of the 946-transition to assimilate the typically exclusive properties of large force generation and large shape change in a single material.