Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Molecular Dynamic Study of A Polymeric Solution (II). Solvent Effect

  • Oh In-Joon (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Lee Young-Seek (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Ree Tai-Kyue (Department of Chemistry, Korea Advanced Institute of Science and Technology)
  • Published : 1983.04.20
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Abstract

Molecular dynamic method has been applied to a single polymer chain immersed in a solvent. The interactions for the pairs, of two solvent molecules (SS), of a chain element and a solvent molecules (CS), and of two non-neighbor chain elements (CC) are given by the Lennard-Jones potential, and the interaction between two bonded chain elements is given by a harmonic potential. We changed the CS interaction parameter ${\varepsilon}_{CS}$ to 0.5, 1.0 and 2.0 times of the SS interaction ${\varepsilon}_{SS}$. We calculated the pair correlation functions for the SS, CS, and CC pairs, end-to-end distance and radius of gyration with the varying ${\varepsilon}_{CS}$ parameters. The results showed that a phase separation occurs between the polymer and solvent in the 0.5 system where ${\varepsilon}_{CS}$ = 0.5 {\varepsilon}_{SS}$. The autocorrelation functions for end-to-end distance and radius of gyration were also calculated.

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  1. Molecular dynamics of chain molecules in solution. Static and dynamic properties vol.91, pp.1, 1983, https://doi.org/10.1063/1.457444
  2. Solvent effect on translational diffusivity and orientational mobility of polymers in solution. A molecular dynamics study vol.99, pp.3, 1983, https://doi.org/10.1063/1.465233