Thin films of liquid crystal fumarates and a related acrylate

被引:7
作者
Bardosova, M [1 ]
Clarke, I [1 ]
Hodge, P [1 ]
Tredgold, RH [1 ]
Woolley, M [1 ]
机构
[1] SLOVAK ACAD SCI,BRATISLAVA,SLOVAKIA
基金
英国工程与自然科学研究理事会;
关键词
Langmuir-Blodgett films (LB films); physical vapour deposition (PVD); polymers; x-ray diffraction;
D O I
10.1016/S0040-6090(96)09550-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Five fumarate esters and one acrylate ester have been synthesized and their properties examined. Four of them can be deposited as multilayers by evaporation in vacuo, and three of this group behave as thermotropic smectic liquid crystals. We have attempted to stabilize the homeotropic smectic phase by polymerizing the film using UV light. In two cases we have been successful and have produced films which are resistant to prolonged heating in THF. We infer that these materials are both polymerized and cross linked. They retain their regular layer structure after polymerization, a behaviour which we have demonstrated by X-ray diffraction, We have also attempted to form Langmuir-Blodgett multilayers with these compounds and in four cases have been successful. (C) 1997 Elsevier Science S.A.
引用
收藏
页码:234 / 239
页数:6
相关论文
共 10 条
[1]   AFM AND X-RAY STUDIES OF FILMS FORMED BY THERMAL EVAPORATION AND BY THE LB TECHNIQUE [J].
ALIADIB, Z ;
HODGE, P ;
TREDGOLD, RH ;
WOOLLEY, M ;
PIDDUCK, AJ .
THIN SOLID FILMS, 1994, 242 (1-2) :157-162
[2]  
BARDOSOVA M, 1996, CHEM COMMUN, P587
[3]  
Gray G.W.J.W.G. Goodby., 1984, SMECTIC LIQUID CRYST
[4]   FORMATION OF HIGHLY ORDERED THIN-FILMS OF PERFLUORINATED CARBOXYLIC-ACIDS AND AZOBENZENES BY THERMAL EVAPORATION [J].
JONES, R ;
TREDGOLD, RH ;
ALIADIB, Z ;
DAWES, APL ;
HODGE, P .
THIN SOLID FILMS, 1991, 200 (02) :375-384
[5]   DO PERFLUORINATED CHAINS ALWAYS HAVE TO BE TWISTED [J].
KNOCHENHAUER, G ;
REICHE, J ;
BREHMER, L ;
BARBERKA, T ;
WOOLLEY, M ;
TREDGOLD, R ;
HODGE, P .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1995, (16) :1619-1620
[6]   POLYMERIZATION OF CADMIUM OCTADECYLFUMARATE IN MULTILAYERS [J].
NAEGELE, D ;
LANDO, JB ;
RINGSDORF, H .
MACROMOLECULES, 1977, 10 (06) :1339-1344
[7]   ORDER-DISORDER TRANSITIONS IN LANGMUIR-BLODGETT-FILMS .2. IR STUDIES OF THE POLYMERIZATION OF CD-OCTADECYLFUMARATE AND CD-OCTADECYLMALEATE [J].
RABE, JP ;
RABOLT, JF ;
BROWN, CA ;
SWALEN, JD .
JOURNAL OF CHEMICAL PHYSICS, 1986, 84 (07) :4096-4102
[8]  
TIEKE B, 1992, POLYM ORG MEDIA, P105
[9]  
TREDGOLD RH, 1994, ORDER THIN ORGANIC F, P82
[10]   ULTRATHIN FILMS OF SMECTIC LIQUID-CRYSTALS ON SOLID SUBSTRATES [J].
WOOLLEY, M ;
TREDGOLD, RH ;
HODGE, P .
LANGMUIR, 1995, 11 (02) :683-686