Effects of polydispersity on the phase coexistence diagrams in multiblock copolymers with Laser block length distribution

Details Effects of polydispersity on the phase coexistence diagrams in multiblock copolymers with Laser block length distribution Effects of polydispersity on the phase coexistence diagrams in multiblock copolymers with Laser block length distribution

2002-07-16

arxiv.org/abs/cond-mat/0207377v1

Physics

Condensed Matter

15 pages, Latex

Scientific paper

10.1016/S0378-4371(03)00633-2

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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