Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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A Theory of Polymer Adsorption from Solution

  • Lee, Woong-Ki (Department of Chemistry, Seoul National University) ;
  • Pak, Hyung-Suk (Department of Chemistry, Seoul National University)
  • Published : 1987.02.20
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Abstract

A statistical thermodynamical treatment for polymer adsorption from solution is presented. The canonical partition function for the polymer solution in the presence of a surface or an impermeable interface is formulated on the basis of usual quasi-crystalline lattice model, Bragg-Williams approximation of random mixing, and Pak's simple treatment of liquid. The present theory gives the surface excess ${\Gamma}_{exc}$ and the surface coverage ${\phi}^s_2$ of the polymer as a function of the chain length x, the Flory-Huggins parameter x, the adsorption energy parameter $x_s$, and polymer concentration $v_2$. Present theory is also applicable to the calculation of interfacial tension of polymer solution against water. For the idealized flexible polymer, interfacial tensions according to our theory fit good to the experimental data to the agreeable degrees.

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References

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