Structure control of lattice-patterned liquid crystals-polymer composites prepared by polarization-selective UV-curing through the addition of a fluorinated acrylate monomer

Shi Joon Sung, Eun Ae Jung, Kyoseung Sim, Dae Hwan Kim, Kuk Young Cho

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The formation of lattice-patterned liquid crystal (LC)-polymer composites by polarization-selective ultraviolet (UV) curing of prepolymers containing cinnamate functional groups is known to be an effective method for controlling the interfacial properties between LC and polymer walls. However, due to the good miscibility of cinnamate functional groups with LC, phase separation between LC and prepolymers is insufficient, and challenges remain with regard to control of the phase separation structure. In this work, we focused on improving the phase separation behavior between LC and a prepolymer containing a photoreactive cinnamate oligomer by introducing a fluorinated acrylate monomer. The results showed that the larger difference in the solubility parameter between the fluorinated acrylate and LC improved the phase separation behavior between the LC and prepolymer, resulting in the fabrication of a more accurate and clear lattice structure of polymer walls. In addition, the introduction of a fluorinated acrylate monomer was found to slightly influence the control of the interaction between LC and polymer walls; this was verified by the decrease in driving voltage of LC-polymer composites. By using the fluorinated acrylate monomer as a component of prepolymers, control of the lattice structure and interfacial properties of polymer walls formed by polarization-selective UV curing becomes possible.

Original languageEnglish
Pages (from-to)42-48
Number of pages7
JournalMicroelectronic Engineering
Volume103
DOIs
StatePublished - Mar 2013

Bibliographical note

Publisher Copyright:
©2012 Elsevier B.V. All rights reserved.

Keywords

  • Fluorinated acrylate
  • Liquid crystal-polymer composite
  • Patterned polymer walls
  • Photo-induced phase separation
  • Polarization-selective UV curing

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