Refine
Has Fulltext
- yes (4) (remove)
Year of publication
- 1991 (4) (remove)
Document Type
- Postprint (4)
Language
- English (4)
Is part of the Bibliography
- no (4)
Keywords
- Amphiphilic Polymers (1)
- LCPs (1)
- Polymerizable surfactant (1)
- Rod-like Polymers (1)
- Stability of LB Films (1)
- micelle (1)
- monolayer (1)
- polysoap (1)
- spacer (1)
- sulfobetain (1)
Institute
- Institut für Chemie (4) (remove)
The use of preformed polymers for the preparation of Langmuir-Blodgett (LB) multilayers is reviewed. Principles for polymer self-organization are outlined and the appropriate molecular designs are discussed. Recent developments in the different classes of polymers for LB multilayers are presented, and their outstanding properties highlighted.
Cationic and zwitterionic polymerizable surfactants bearing tri- and tetraethyleneglycol spacer groups between the polymerizable moiety and the surfactant structure were prepared and polymerized. Monomers and polymers were investigated with respect to their aggregation behavior in aqueous systems and compared to analogous monomers and polymers lacking spacer groups. In the case of the monomeric surfactants, the spacer groups depress both the Kraffttemperature and the critical micelle concentration. the area occupied per molecule at the air-water interface is substantially enlarged by the spacers, whereas the depression of surface tension is nearly constant. Although the monomers with and without spacers are true surfactants, all the polymers are water-insoluble, but form monomolecular layers at the air-water interface. In analogy to the monomer behavior, the incorporation of the spacer groups increases the area occupied per repeat unit at the air-water interface substantially, but hardly affects the surface activity.