Skip to main content
Article
Reversible Actuating and Writing Behaviours of a Head-To-Side Connected Main-Chain Photochromic Liquid Crystalline Polymer
Journal of Materials Chemistry C (2013)
  • Dae-Yoon Kim
  • Sang-A Lee
  • Hyong Jong Choi
  • Liang-Chy Chien, Kent State University - Kent Campus
  • Myong-Hoon Lee
  • Kwang-Un Jeong
Abstract

A photochromic liquid crystalline (LC) polymer {4-butoxy-2'-(4-hex-5-enyloxy)-4'-(4-hex-5-enyl-oxybenzyloxy)azobenzene, abbreviated as PLCP} was newly synthesized via the acrylic diene metathesis polymerization (H. J. Choi, et al., J. Mater. Chem., 2009, 19, 7124). Utilizing the combined techniques of differential scanning calorimetry, cross-polarized optical microscopy, and wide-angle X-ray diffraction (WAXD), it was realized that PLCP formed a nematic (N) phase below the isotropization temperature (T-NI = 145 degrees C) and the N phase turned to the glassy N phase below the glass transition temperature (T-g = 24 degrees C). Especially, two-dimensional (2D) WAXD of the uniaxially oriented PLCP fibre indicated that the N phase contains the synclinically tilted smectic C (SmC)-type cybotactic clusters in which the molecular packing structure is related to the head-to-side connected chemical structure of PLCP. Without introducing any chemical crosslinks, PLCP fibres and films were reversibly deformed by exposing to ultraviolet and visible light. Additionally, we demonstrated the rewritable micro-patterned PLCP film. Because of the wireless remote-controlled actuating behaviours of PLCP combined with its excellent processability, PLCP can be applied in optoelectronic and bio-mimetic devices.

Disciplines
Publication Date
2013
Publisher Statement
Available on publisher's site at http://dx.doi.org/10.1039/c2tc00506a.
Citation Information
Dae-Yoon Kim, Sang-A Lee, Hyong Jong Choi, Liang-Chy Chien, et al.. "Reversible Actuating and Writing Behaviours of a Head-To-Side Connected Main-Chain Photochromic Liquid Crystalline Polymer" Journal of Materials Chemistry C Vol. 1 Iss. 7 (2013)
Available at: http://works.bepress.com/liang-chy_chien/14/