Calorimetric and X-ray Diffraction Studies of Critical Behavior at the Nematic to Lamellar Phase Transition
Korea Polymer Journal
The nematic (N) to lamellar (Lα) phase transition in binary mixtures of cesium perfluorooctanoate (CSPFO) and water has been studied by high-precision calorimetry and high-resolution synchrotron x-ray scattering. The artio of the heat capacity amplitudes, above and below the NLα transition, and the corresponding critical exponent α on seven CSPFO concentrations remain near 1 and 0, respectively, suggesting that the transition is a second order in agreement with 3-d XY type behavior. The longitudinal correlation lengthII and the susceptibility associated with the lamellar phase fluctuations in the N phase at the concentration 46.6 wt% CSPFO were measured over three decades of reduced temperature and found to diverge with critical exponent , respectively.
Shin, S. T.; Kim, K. H.; and Kumar, Satyendra (1998). Calorimetric and X-ray Diffraction Studies of Critical Behavior at the Nematic to Lamellar Phase Transition. Korea Polymer Journal 6(4), 318-324. Retrieved from https://digitalcommons.kent.edu/phypubs/198