On thermodynamic stability of heteropolymer mesophases formed under weak segregation regime
Physics Department, Lomonosov Moscow State University, Vorobjevi Gory, 119992 Moscow, Russia
2 Engelhardt Institute of Molecular Biology, RAS, Vavilova str. 32, 119991 Moscow, Russia
Corresponding author: a email@example.com
Published online: 28 July 2007
Conditions of local and global thermodynamic stability of spatially-periodic mesophases formed in an incompressible melt of binary monodisperse copolymers with molecules of arbitrary chemical structure are theoretically scrutinized. For the first time a bifurcation analysis of the Landau free energy in the first harmonic approximation is carried out. Based upon this analysis, feasible scenarios of bifurcation and phase transitions between mesophases of different morphology are discussed. The description of thermodynamic behavior of some systems is presented to exemplify the implementation of the approach proposed.
PACS: 02.30.Oz – Bifurcation theory / 64.10.+h – General theory of equations of state and phase equilibria / 82.35.Jk – Copolymers, phase transitions, structure
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007