Thermoreversible Gelation of Isotropic and Liquid Crystalline Solutions of a 'Sticky' Rodlike Polymer
Autor: | Sarah Schmidtke, Ioan I. Negulescu, Elena Temyanko, Ebru Buyuktanir, Javier Nakamatsu, Paul S. Russo, Bilge Turfan |
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Rok vydání: | 2000 |
Předmět: |
chemistry.chemical_classification
Polarized light microscopy Polymers and Plastics Chemistry Liquid crystalline Organic Chemistry Isotropy Polymer Fluorescence Photobleaching Recovery Inorganic Chemistry Differential scanning calorimetry Chemical engineering Polymer chemistry Materials Chemistry Molecule |
Zdroj: | Macromolecules. 33:4427-4432 |
ISSN: | 1520-5835 0024-9297 |
Popis: | Thermoreversible gelation of rodlike poly(A-stearyl-R-L-glutamate) in n-dodecane has been studied by differential scanning calorimetry, polarized light microscopy, visual observations, and temperature ramped fluorescence photobleaching recovery. Solutions spanning a wide range of concentra- tions can produce gels. In solutions that are initially liquid crystalline, long-range features such as cholesteric twist appear to be frozen by gelation. Although gelation is rapid, some of the polymer molecules retain significant mobility, allowing the gels to "cure" slowly. |
Databáze: | OpenAIRE |
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