Nonideal behavior of the intramolecular structure factor of dilute polymers in a theta solvent

Kenji Shimomura, Hiizu Nakanishi, Namiko Mitarai

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We study the configurational properties of single polymers in a theta solvent by Monte Carlo simulation of the bond fluctuation model. The intramolecular structure factor at the theta point is found to be distinctively different from that of the ideal chain. The structure factor shows a hump around q∼5/ Rg and a dip around q∼10/ Rg in the Kratky plot with Rg being the radius of gyration. This feature is apparently similar to that in a melt. The theoretical expression by the simple perturbation expansion to the first order in terms of the Mayer function can be fitted to the obtained structure factor quite well, but the second virial coefficient cannot be set to zero.

Original languageEnglish
Article number051804
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume80
Issue number5
DOIs
Publication statusPublished - Nov 30 2009

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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