Laser block length distribution and influence of its parameters (K and M) on the phase behavior of statistical multiblock copolymers

The phase diagram of AB-multiblock copolymer melts containing A and B blocks obeying the Laser distribution, has been investigated for various values of the parameters K and M. As M-->infinity it reduces to the ordinary Schultz-Zimm distribution. With decreasing M, the transition lines of the lamellar, hexagonally close-packed cylinders and body-centered-cubic phases shift to greater N x chi, so that for high K these shifts are very large while for low K they are very small. (C) 2002 Published by Elsevier Science B.V.