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  • Polymer and Materials Science  (1)
  • Polysoap  (1)
  • liquid crystals  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Monolayers of rod-shaped and disc-shaped liquid crystalline compounds at the air-water interface (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 659-667 
    Details
    ISSN: 1435-1536
    Schlagwort(e): Monolayers ; liquid crystals ; discotics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01469526
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  • 2
    Digitale Medien
    Digitale Medien
    Amphiphilic hyperbranched polyelectrolytes: a new type of polysoap (1999)
    Springer
    Colloid & polymer science 277 (1999), S. 519-527 
    Details
    ISSN: 1435-1536
    Schlagwort(e): Key words Hyperbranched polymer ; Polyelectrolyte ; Polysoap ; Micellar polymer ; Ionene
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Notizen: Abstract Hyperbranched hydrophobized polyelectrolytes of the ionene type are prepared. They are investigated as a new type of polysoap, with respect to viscosifying behaviour, surface activity and solubilization power. Compared to linear analogues, the viscosifying effect is reduced. Compared to classical polysoap architectures, such as analogous “tail-end-type” and “head-type” polysoaps, the hyperbranched polysoaps behave rather similarly to the “head-type” ones: they exhibit notable surface activity, whereas the solubilization capacity is moderate only.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003960050419
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  • 3
    Digitale Medien
    Digitale Medien
    Oriented supramolecular systems-polymeric monolayers and multilayers from prepolymerized amphiphiles (1986)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 145 (1986), S. 1-17 
    Details
    ISSN: 0003-3146
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Oriented polymeric membranes were originally prepared by polymerization or polycondensation of preoriented monomers. The introduction of hydrophilic spacer groups into the polymeric amphiphiles allowed the formation of highly ordered systems (monolayers, liposomes, multilayers) from prepolymerized amphiphiles: due to the partial decoupling of the different mobilities and orientation tendencies of the polymer chain and the amphiphilic side groups, these polymers are able to self-organize. In monolayer experiments the high order of these membranes could be demonstrated by their surface pressure area-diagrams. In addition the combination of order and mobility of these spacer groups containing polymeric amphiphiles allowed the formation of Langmuir-Blodgett-multilyers with a high layer correlation. Thus, disturbancies in highly oriented layers can be avoided normally taking place during the polymerization reaction (e.g. contractions) or oriented monomeric layers.
    Zusätzliches Material: 14 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/apmc.1986.051450101
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