PHASE-EQUILIBRIUM IN MIXTURES OF FLEXIBLE AND STIFF POLYMERS STUDIED BY MONTE-CARLO SIMULATION

We present computer simulations of dense polymer mixtures composed of flexible and semiflexible chains. It is found that a demixing transition takes place below a certain degree of flexibility, even without introducing repelling interactions between the two polymers except the excluded volume condition. Computing the equilibrium concentration of phases for various temperatures, a phase diagram for the binary mixture is found. The results show qualitative agreement with the Flory lattice theory of stiff chains.