TY - JOUR
T1 - Structure control of lattice-patterned liquid crystals-polymer composites prepared by polarization-selective UV-curing through the addition of a fluorinated acrylate monomer
AU - Sung, Shi Joon
AU - Jung, Eun Ae
AU - Sim, Kyoseung
AU - Kim, Dae Hwan
AU - Cho, Kuk Young
N1 - Publisher Copyright:
©2012 Elsevier B.V. All rights reserved.
PY - 2013/3
Y1 - 2013/3
N2 - 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.
AB - 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.
KW - Fluorinated acrylate
KW - Liquid crystal-polymer composite
KW - Patterned polymer walls
KW - Photo-induced phase separation
KW - Polarization-selective UV curing
UR - http://www.scopus.com/inward/record.url?scp=84869864515&partnerID=8YFLogxK
U2 - 10.1016/j.mee.2012.09.010
DO - 10.1016/j.mee.2012.09.010
M3 - Article
AN - SCOPUS:84869864515
SN - 0167-9317
VL - 103
SP - 42
EP - 48
JO - Microelectronic Engineering
JF - Microelectronic Engineering
ER -