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Paper   IPM / P / 6981
School of Physics
  Title:   Effects of Polydispersity on the Phase Coexistence Diagrams in Multiblock Copolymers with Laser Block Length Distribution
1.  M. Foroutan
2.  M.A. Jafarizadeh
  Status:   Published
  Journal: Physica A
  No.:  110
  Vol.:  329
  Year:  2003
  Pages:   337-349
  Supported by:  IPM
Phase behavior of AB-multiblock copolymer melts which consists of chains with Laser distribution of A and B blocks have been investigated in the framework of the mean-field theory, where the polydispersity of copolymer is a function of two parameters K and M. The influence of the Laser distribution on higher order correlation functions (up to sixth order) are computed for various values of K and M, and their contributions on the phase diagrams and phase coexistence are presented. It is shown that, with increasing polydispersity (decreasing K and increasing M) the transition lines of all phases shift upwards, consequently polydispersity destabilize the system.

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