Title: Synthesis of liquid crystalline polysiloxanes containing naphthalene-based mesogens and chiral side chains
Authors: Hsu, CS
Leu, YJ
交大名義發表
應用化學系
National Chiao Tung University
Department of Applied Chemistry
Keywords: side-chain liquid crystalline polymer;polysiloxane;naphthalene-based mesogen
Issue Date: 1997
Abstract: The synthesis and characterization of side-chain liquid crystalline polysiloxanes containing (2S)-2-chloro-4-methylpentyl 4-[(6-alkanyloxynaphthyl-2-yl)carbonyloxy]benzoate and (2S,3S)-2-chloro-3-methylpentyl 4-[(6-alkanploxynaphthyl-2yl)carbonyloxy]benzoate side groups are presented. All of the obtained polymers reveal respectively an enantiotropic smectic A phase. The phase transition temperatures of the obtained polymers depend on the spacer length. As the spacer length increases the glass transition temperature decreases while the isotropization temperature increases. The thermal stability of the obtained polymers increases as the spacer length increases. All of the obtained polymers present no chiral smectic C phase. The result seems to demonstrate that incorporation of a naphthalene ring in the mesogenic core decreases the tendency to form a chiral smectic C phase.
URI: http://hdl.handle.net/11536/837
http://dx.doi.org/10.1080/10587259708042340
ISSN: 1058-725X
DOI: 10.1080/10587259708042340
Journal: MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume: 300
Begin Page: 83
End Page: &
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