Microphase separation in polydisperse rod-rod diblock copolymer melt.
The stability limits of the isotropic state of melt of rod-rod AB polydisperse diblock copolymer have been studied within weak segregation theory. The number of units in A block is assumed to be a random variable distributed by the Schulz-Zimm distribution. Inspection of the spinodal curves shows that the copolymer melt with polydisperse rigid blocks is less stable with respect to formation of the nematic and microphase separated states than the monodisperse melt. The values of ratios between strengths of isotropic and anisotropic interactions in the system strongly influences the forms of isotropic-nematic boundary curves.
Institute of Biochemical Physics, 4 Kossygina st., 119334 Moscow, Russia.
M A
MA
Aliev
Institute of Biochemical Physics, 4 Kossygina st., 119334 Moscow, Russia.
N Yu
NY
Kuzminyh
D011108:Polymers / Q000737:chemistry*; D013816:Thermodynamics
D011108:Polymers