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  • 1
    Electronic Resource
    Electronic Resource
    Smectic rheology (1997)
    Springer
    Rheologica acta 36 (1997), S. 498-504 
    Details
    ISSN: 1435-1528
    Keywords: Key words Smectic ; modulus ; strain amplitude ; yield stress ; yield strain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract We have studied the oscillatory shear response of three thermotropic smectic-A liquid crystalline materials with no external aligning field (other than the necessary presence of rheometer plates). Two are polymers (one main-chain and one side-chain) and the other is a small molecule smectic. All three exhibit the classical linear response to oscillatory shear characteristic of a viscoelastic solid at sufficiently small strain amplitudes and frequencies. However, for strain amplitudes exceeding a small critical value, these materials exhibit a strongly nonlinear response to strain, which is characterized in detail. While the low-strain moduli and the critical strain of the three smectics are considerably different, the nonlinear response has some universal character which is presumably related to the low energy for the formation of defects in smectic liquid crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003970050064
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Smectic rheology (1997)
    Springer
    Rheologica acta 36 (1997), S. 498-504 
    Details
    ISSN: 1435-1528
    Keywords: Smectic ; modulus ; strain amplitude ; yield stress ; yield strain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract We have studied the oscillatory shear response of three thermotropic smectic-A liquid crystalline materials with no external aligning field (other than the necessary presence of rheometer plates). Two are polymers (one main-chain and one side-chain) and the other is a small molecule smectic. All three exhibit the classical linear response to oscillatory shear characteristic of a viscoelastic solid at sufficiently small strain amplitudes and frequencies. However, for strain amplitudes exceeding a small critical value, these materials exhibit a strongly nonlinear response to strain, which is characterized in detail. While the low-strain moduli and the critical strain of the three smectics are considerably different, the nonlinear response has some universal character which is presumably related to the low energy for the formation of defects in smectic liquid crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00368127
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Functional particles by dispersion polymerization 4: Core-shell tunable surface microspheres for selective enzyme adsorption (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 548-552 
    Details
    ISSN: 1042-7147
    Keywords: core-shell microsphere ; dispersion polymerization ; Eudragit ; hydrophobic-hydrophilic surfaces ; endopectinlyase ; endopolygalacturonase ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A core - shell microsphere sample prepared by dispersion polymerization using a polyacid as the steric stabilizer was studied for its endopectinlyase and endopolygalacturonase adsorption behavior. The endopectinlyase adsorption yield decreases with increasing the medium pH, whereas the opposite behavior is observed for the endopolygalacturonase adsorption yield. This opposite adsorption tendency is correlated to the microsphere surface nature which was proved to be hydrophilic according to the medium pH.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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