Synthesis and Study of Hydrogen-Bonded Blue Phase Liquid Crystal Bi-Mesogenic Side-Chain Polymers

• Main Authors: Lin,Ray, 林叡
• Other Authors: Lin,Hong-Cheu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/5uy94r

碩士 === 國立交通大學 === 材料科學與工程學系奈米科技碩博士班 === 104 === We designed three carboxylic acid monomers A*B, A*FB and A*FBB containing acrylate group, and three different H-acceptors with pyridyl moiety. Due to the supramolecular forces between the H-donors and H-acceptors, a series of novel asymmetric hydrogen-bonded dimeric complexes were self-assembled successfully. In addition, a series of Bi-Mesogenic Side-Chain Polymers were prepared by photo-polymerization. The result demonstrates that the combination of homopolymer pA*FB and the H-acceptor Py6CB, which have no chiral center on the alkyl chain, could induce the blue phase BP III. The temperature range of the pA*FB/Py6CB system is 8.2 oC. To further improve the blue phase polymer system, we have taken two ways. One way is that we used the copolymerization of A*B and A*FB to get the system p(A*FB+A*B)/Py6CB. The other is mixing two H-acceptors Py6CB and Py6*CB to increase the overall chirality of the polymer system. The former is fail to broaden the temperature range of BP, but the pA*FB/(Py6CB+Py6*CB) system can increase the temperature range to 10.4 oC when the ratio of Py6CB to Py6*CB is 9:1.