標題: SYNTHESIS AND CHARACTERIZATION OF CHIRAL SMECTIC SIDE-CHAIN LIQUID-CRYSTALLINE POLYSILOXANES CONTAINING 2,5-DISUBSTITUTED-1,3-DIOXANE BASED MESOGENIC SIDE-GROUPS
作者: JUANG, TM
LEU, YJ
HSU, CS
應用化學系
Department of Applied Chemistry
關鍵字: FERROELECTRIC LIQUID CRYSTAL;SIDE-CHAIN LIQUID CRYSTALLINE POLYMER;TRANS-1,3-DIOXANE-BASED MESOGEN;POLYSILOXANE BACKBONE
公開日期: 1993
摘要: The synthesis of three liquid crystalline polysiloxanes containing 4-[(S)-2-methyl-1-butoxycarbonyl]phenyl 4-(trans-5-alkanyl-1,3-dioxan-2-yl]benzoates side groups is presented. The phase behavior of both monomeric and polymeric liquid crystals was characterized by optical polarizing microscopy, differential scanning calorimetry and X-ray diffraction measurements. The monomer which contains eleven methylene units in the spacers is the only one to exhibit the enantiotropic smectic A and chiral smectic C phases. The polymer containing six methylene units in the spacers presents an enantiotropic smectic A phase while the polymer containing eleven methylene units in the spacers shows an enantiotropic smectic A and a monotropic smectic B phase.
URI: http://hdl.handle.net/11536/3198
http://dx.doi.org/10.1080/10587259308030138
ISSN: 1058-725X
DOI: 10.1080/10587259308030138
期刊: MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume: 237
起始頁: 223
結束頁: &
Appears in Collections:Articles