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URN etd-0630106-174714 Statistics This thesis had been viewed 2338 times. Download 1004 times. Author Shih-cheng Yang Author's Email Address No Public. Department Chemical Engineering Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 71 Title Synthesis and Properties of
Ferroelectric and Antiferroelectric of Chiral Liquid Crystals Derived from (S)-[1-methyl-2-(2’-methylsulfanylethoxy)]ethanol
Keyword V-shaped switching Chiral Liquid Crystal Ferroelectric Liquid Crystal Ferroelectric Liquid Crystal Chiral Liquid Crystal V-shaped switching Abstract Research this prove optical rotation layer arrange looks relation between the his structure and nature of liquid crystal mainly, Israel (S) -[1-methyl-2-(2' -methylsulfanylethoxy) ]Ethanol formates a series of optical rotation liquid crystal materials for the initial thing, probe into and does not fasten all end length ' m ' of alkane chain it to the looks of the liquid crystal and influence of the photoelectric characteristic of physics, in order to establish molecular structure and relation of fastenning the looks of all liquid crystal.
The experimental result shows: The first serial of liquid crystal material I (m=8-12) only shows SmA* phase. In the second serial II (m=8-10) shows SmA*, SmC* and SmCA* three kinds of liquid crystal phases. Change and does not fasten all end length ' m ' of alkane chain, find it with not fastenning the increase of all end length ' m ' of alkane chain, the reducing thereupon of temperature range of the looks of the liquid crystal, namely clarify some temperature with rising with reducing, crystalline temperature temperature
The second serial liquid crystal chemical compound shows when SmC* liquid crystal carries on the photoelectricity amount to examine that can get the V type and change the behavior under changing the temperature and frequency, electric current change quantity of behavior examine result can is it fasten all end alkane chain length ' m ' is it have heavy difference too to change to receive. Second series of spontaneity polarization values maximum lie between 93 nC/cm2 and angle of inclination maximum lie between 31o- 35o.
Advisor Committee Shune-Long Wu - advisor
Jin-Jei Wu - co-chair
Jiunn-Yih Lee - co-chair
Wen-Fu Lee - co-chair
Files Date of Defense 2006-06-15 Date of Submission 2006-06-30