ON MICROPHASE SEGREGATION OF INTERPENETRATING POLYMER NETWORKS

The topological entanglements between subchains of two interpenetratin g polymer networks are described in the simplest approximation supposi ng that the primitive path of each subchain is influenced due to the s hift of one network relatively to the other. The entanglement contribu tion to the free energy of the networks is shown to behave as 1/q2 for the state with deviation from uniform densities with the wave vector of order q. This contribution is shown to cause the microphase type of segregation.