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Updated: Jun 14, 2026

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
Published on: September 26, 2016
Nonideal behavior of the intramolecular structure factor of dilute polymers in a theta solvent
Kenji Shimomura1, Hiizu Nakanishi, Namiko Mitarai
1Department of Physics, Kyushu University 33, Fukuoka 812-8581, Japan.
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 approximately 5/Rg and a dip around q approximately 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.
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