The monodomain CLCP film bent toward the irradiation source along the rubbing
direction and reverted to the initial flat state upon exposure to visible light. This
bending and unbending behavior was reversible and controlled by simply altering
the wavelength of the incident light. Furthermore, when the film was rotated by 90
,
the bending behavior was again observed along the rubbing direction. These results
illustrate that the bending is anisotropically induced and occurs only along the
rubbing direction.
Fig. 2 (a) Chemical structures of the monomers and crosslinker. (b) Photoinduced contraction of
CLCP. ⎕ = 313 K, △ = 308 K, ○ = 303 K, * = 298 K. (Inset) Recovery of the contracted CLCP at
298 K after irradiation was switched off (Finkelmann et al. 2001)
13 Photodeformable Liquid Crystalline Polymers (LCPs)
365
direction and reverted to the initial flat state upon exposure to visible light. This
bending and unbending behavior was reversible and controlled by simply altering
the wavelength of the incident light. Furthermore, when the film was rotated by 90
,
the bending behavior was again observed along the rubbing direction. These results
illustrate that the bending is anisotropically induced and occurs only along the
rubbing direction.
Fig. 2 (a) Chemical structures of the monomers and crosslinker. (b) Photoinduced contraction of
CLCP. ⎕ = 313 K, △ = 308 K, ○ = 303 K, * = 298 K. (Inset) Recovery of the contracted CLCP at
298 K after irradiation was switched off (Finkelmann et al. 2001)
13 Photodeformable Liquid Crystalline Polymers (LCPs)
365