Washing effects on the anchoring energy and surface order parameter on rubbed polymer surfaces containing the trifluoromethyl moiety |
| |
Authors: | Jeong-Mim Han Jeoung-Yeon Hwang Dae-Shik Seo Sang-Keuk Lee Joon-Ung Lee |
| |
Institution: |
a Department of Electrical and Electronic Engineering (C-724), College of Engineering, Yonsei University, Seoul 120-749, Korea
b Department of Electrical Engineering, College of Electronics & Information, Kwangwoon University, Seoul 139-701, Korea |
| |
Abstract: | The washing effects on liquid crystal (LC) alignment capability in a NLC, 4-n-pentyl-4'-cyanobiphenyl (5CB), on a rubbed polyimide (PI) surface containing the trifluoromethyl moiety were studied. The extrapolation length de of 5CB on the rubbed PI surface decreases with the rubbing strength RS. Also, the large extrapolation length de of 5CB for washing with IPA was measured at RS=114?mm. The polar anchoring energy of 5CB on the rubbed PI surface was decreased by the washing process; it increased with the rubbing strength RS on the PI surface. The surface order parameter SS of 5CB for all the washing processes is smaller than for the non-washing process. Consequently, the polar anchoring energy and surface order parameter Ss in 5CB are largely attributed to washing effects. |
| |
Keywords: | |
本文献已被 InformaWorld 等数据库收录! |
|