- 作者: 蔡文亮 ; 李政道
- 作者服務機構: 工業技術研究院工業材料研究所
- 中文摘要: New ferroelectric liquid crystals containing two chiral centers, 4-(4'-n-alkyloxyphenyl)phenyl 4-(2(S)- [ 2(S)-methylbutyloxy ] propoxy)benzoate (4a-4f) and 4-(n- alkyloxy)phenyl 4-(4'- [ 2(S)-(2(S)-methylbutyloxy)propoxy ] phenyl)benzoate (5a-5f) were synthesized and their physical properties studied. A phase-transition sequence of C- Sc/sup */-N/sup */-I was observed in most cases. Some homologues of them, (4a-4d), possess monotropic Sc/sup */ phase. Not only the Sc/sup */ phase-transition temperature of (5a-5f) is lower than that of the corresponding (4a-4f), but their Sc/sup */ phase-transition temperature range is also wider than the corresponding (4a-4f). The Sc/sup */ phase temperature range can be up to 48.degree.C. The spontaneous polarization of 8-28nC/cm/sup 2/ and the electric rise time of 240-420.mu.s were measured in FLCs(4a-5f).
- 英文摘要: --
- 中文關鍵字: Chiral Propanol; Liquid Crystal; Chiral Smectic Phase; Spontaneous Polarization; Physical Property
- 英文關鍵字: 旋光性丙醇;液晶;旋光性脂相;自發極化;物理性質