Abstract For improving process efficiency of polymer-sustained-alignment liquid crystal displays (PSA-LCDs), new photo-initiation monomers (PI-monomers), 2-methoxy-2-methacryloyl-oxy-ethoxy-2-phenylacetophenon (2-MMOEP) and 2,2-dimethacryloyl-oxy-ethoxy-2-phenylacetophenon (2,2-DMOEP), were developed and investigated image sticking characteristics. LC cells having PSA layers formed from a monomer 4,4′-dimethacryloyl-oxy-biphenyl (4,4′-DMABiph) and each PI-monomer were fabricated, and voltage holding ratio (VHR) and residual direct current voltage (VrDC) were clarified as the image sticking characteristics. The VHR and the VrDC were improved with the LC cells having the PSA layers formed from 4,4′-DMABiph and 2,2-DMOEP owing to large rate constant of polymerization. In contrast, the VHR and the VrDC were deteriorated with the LC cells having the PSA layers formed from 4,4′-DMABiph and 2-MMOEP. The deterioration of the VHR and the VrDC was derived from the increase in the concentration of radical and/or ion generated from 2-MMOEP. The results indicate that the number of polymerizable group in the PI-monomer is important, and plural number of polymerizable group in the PI-monomer leads to high VHR and low VrDC.

中文翻译：

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含联苯和苯缩酮基混合单体的聚合物持续取向液晶盒的电压保持率和剩余直流电压特性

摘要 为了提高聚合物持续取向液晶显示器 (PSA-LCD) 的工艺效率，新型光引发单体 (PI-单体)、2-甲氧基-2-甲基丙烯酰-氧-乙氧基-2-苯基苯乙酮 (2-MMOEP) ) 和 2,2-二甲基丙烯酰-氧-乙氧基-2-苯基苯乙酮 (2,2-DMOEP) 被开发并研究了图像残留特性。制造具有由单体 4,4'-二甲基丙烯酰-氧基-联苯 (4,4'-DMABiph) 和每种 PI-单体形成的 PSA 层的 LC 电池，并制备了电压保持率 (VHR) 和剩余直流电压 (VrDC)被澄清为图像残留特性。由于聚合的速率常数大，具有由 4,4'-DMABiph 和 2,2-DMOEP 形成的 PSA 层的 LC 电池提高了 VHR 和 VrDC。相比之下，对于具有由 4,4'-DMABiph 和 2-MMOEP 形成的 PSA 层的 LC 电池，VHR 和 VrDC 劣化。VHR 和 VrDC 的恶化源于 2-MMOEP 产生的自由基和/或离子浓度的增加。结果表明，PI-单体中可聚合基团的数量很重要，PI-单体中的多个可聚合基团导致高VHR和低VrDC。