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ABSTRACT
Liquid crystal cells having polymer layers produced from copolymers of 4,4′-dimethacryloyl-oxy-biphenyl (4,4′-DMABiph) and anthracene-carrying monomers, 2,7-dimethacryloyl-oxy-anthracene (2,7-DMAAnth) and 2-methacryloyl-oxy-anthracene (2-MAAnth), were fabricated, and generation mechanism of residual direct current voltage (VrDC) was clarified. The VrDC was improved with the LC cells having the polymer layers produced from the copolymers of 4,4′-DMABiph and 2,7-DMAAnth due to large rate constant of polymerisation. In contrast, the VrDC was increased with the LC cells having the polymer layers produced from the copolymer of 4,4′-DMABiph and 2-MAAnth. The increase in the VrDC was derived from the increase in the concentration of polymerised- or unpolymerised-terminally radical and ion generated from 2-MAAnth. The results suggest that the monomers should show large rate constant of polymerisation with plural number of polymerised groups for improving the VrDC.
GRAPHICAL ABSTRACT
Disclosure statement
No potential conflict of interest was reported by the authors.