@misc{AntonLaschewskyWard1995, author = {Anton, Peter and Laschewsky, Andr{\´e} and Ward, M. D.}, title = {Solubilization control by redox-switching of polysoaps}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17336}, year = {1995}, abstract = {Reversible changes in the self-organization of polysoaps may be induced by controlling their charge numbers via covalently bound redox moieties. This is illustrated with two viologen polysoaps, which in response to an electrochemical stimulus, change their solubility and aggregation in water, leading from homogeneously dissolved and aggregated molecules to collapsed ones and vice verse. Using the electrochemical quartz crystal microbalance (EQCM), it could be shown that the reversibility of this process is better than 95\% in 16 cycles.}, language = {en} } @misc{AntonLaschewsky1993, author = {Anton, Peter and Laschewsky, Andr{\´e}}, title = {Zwitterionic polysoaps with reduced density of surfactant side groups}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17301}, year = {1993}, abstract = {Several zwitterionic polymers were prepared by radical homopolymerization of surfactant monomers which bear diallyl, diene or vinylcyclopropane moieties. These polymer systems were complemented by alternating copolymers of appropriate zwitterionic vinyl compounds. Thus, polymers with reduced (as compared with simple vinylic homopolymers, or statistical copolymers) and well defined density of surfactant side groups are obtained. The solubilities found for these polymers are dominated by polymer geometry rather than by the balance of hydrophilic and hydrophobic fragments, thus corroborating a main-chain spacer model proposed recently. All water-soluble polymers exhibit characteristic features of classical polysoaps, as shown by surface tension measurements and by solubilization of hydrophobic dyes. In contrast, the water-insoluble copolymers are capable to form stable monolayers at the air-water interface.}, language = {en} } @misc{AntonLaschewsky1994, author = {Anton, Peter and Laschewsky, Andr{\´e}}, title = {Solubilization by polysoaps}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17327}, year = {1994}, abstract = {The aqueous solubilization power of several series of micellar homopolymers and copolymers (polysoaps) is investigated. Using five insoluble or poorly water-soluble dyes, comparisons of the capacities are made with respect ot the influence of structural variables such as the polymer backbone, the polymer geometry, the comonomer content, and the charge of the hydrophilic group. Some guidelines for polysoap structures suited for efficient solubilization are established. Noteworthy is that the solubilization capacities of the polysoaps are neither linked to the ability to reduce the surface tension of water, nor to the polarity of the solubilization sites deduced from spectroscopic probes.}, language = {en} } @misc{AntonLaschewsky1991, author = {Anton, Peter and Laschewsky, Andr{\´e}}, title = {Polysoaps via alternating olefin/SO2 copolymers}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17216}, year = {1991}, abstract = {Contents: Introduction Results and discussion - Monomers studied - Monomer properties - Polymerization, copolymer composition and general properties - Polymer properties in aqueous solution Conclusion Experimental part - Materials - Copolymerization with S02 (typical procedure) - Methods}, language = {en} } @misc{AntonKoeberleLaschewsky1993, author = {Anton, Peter and K{\"o}berle, Peter and Laschewsky, Andr{\´e}}, title = {Recent developments in the field of micellar polymers}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17263}, year = {1993}, abstract = {This article describes recent achievements in the field of micellar polymers, or polysoaps. Taking advantage of zwitterionic model polymers, systematic variations of the molecular architecture have provided an improved understanding of the relationship between the molecular structure of the polymers and their key properties such as surface activity and solubilization capacity. Useful rules are established, which take into account much of the previous data in the literature.}, language = {en} } @misc{AlbrechtCummingKreuderetal.1986, author = {Albrecht, O. and Cumming, W. and Kreuder, W. and Laschewsky, Andr{\´e} and Ringsdorf, Helmut}, title = {Monolayers of rod-shaped and disc-shaped liquid crystalline compounds at the air-water interface}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17124}, year = {1986}, abstract = {Calamitic (rod-shaped) and discotic (disc-shaped) thermotropic liquid crystalline (LC) compounds were spread at the air-water interface, and their ability to form monolayers was studied. The calamitic LCs investigated were found to form monolayers which behave analogously to conventional amphiphiles such as fatty acids. The spreading of the discotic LCs produced monolayers as well, but with a behaviour different from classical amphiphiles. The areas occupied per molecule are too small to allow the contact of all hydrophilic groups with the water surface and the packing of all hydrophobic chains. Various molecular arrangements of the discotics at the water surface to fit the spreading data are discussed.}, language = {en} }