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
Rok vydání: 2000
Předmět:
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