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The defense date of the thesis is 2012-08-22
The current date is 2019-04-23
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URN etd-0810112-143855 Statistics This thesis had been viewed 1164 times. Download 0 times. Author Chih-Hsuan Chang Author's Email Address No Public. Department Chemical Engineering Year 2011 Semester 2 Degree Master Type of Document Master's Thesis Language Chinese&English Page Count 97 Title Synthesis and Investigation of T-shaped and Rod-like Liquid Crystal Materials with Branched Alkyl Chain and Swallow-Tailed Chiral Groups Keyword binary mixtures liquid crystal chiral swallow-tailed compound chiral swallow-tailed compound binary mixtures liquid crystal Abstract This study is divided into three parts, to study the mesomorphic properties of the T-shaped and rod-like liquid crystals with chiral swallow-tail derived from optically active (S)-lactic acid by changing chiral alkyl chain length. In addition, binary mixtures prepared from different rod- like liquid crystals are investigated.
In the first part, the results of all of T-shaped compound Tmn with various alkyl chain length of swallow tail exhibit only SmA* mesophases.
In the second part, when extending the alkyl chain length of chiral greater than 2, the N* and TGBA* phase formation is suppressed for rod-like series of compound 1Cmn.
The third part of the works was to investigate the binary mixture materials. Thus, binary mixtures (TC31 and TNLC3, TC31 and 5CB) with the weight percentage ratios were prepared to investigate the formation of mesophases. Compound TC31 mixed with TNCL3 or 5CB causes the formation of frustrated BP and TGB phases. The wider temperature range of blue phase appeared at the 1:1 ratio of TC31 and 5CB about 3.8°C.
Advisor Committee Chiung-Cheng Huang - advisor
Files Date of Defense 2012-07-20 Date of Submission 2012-08-22