Abstract
The Monte Carlo method has been used to investigate the free energy change ΔF h when two solid particles with flexible polymer chains attached to their surface are approaching one another. The dependence of ΔF h on the distance h between the particle surfaces, on the degree of filling of the surfaces by the chains, and on the chain length and the thermodynamic quality of the solvent has been investigated. Given a sufficiently high degree of covering of the particles with the polymeric monolayer their close approachement results in strong repulsion even in a thermodynamically poor solvent. The results obtained are in agreement with the experimental data.
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