Structural aspects of a three-dimensional lattice model for the glass transition of polymer melts: a Monte Carlo simulation

Jörg Baschnagel and Kurt Binder

Physica A: Statistical Mechanics and its Applications, 1994, vol. 204, issue 1, 47-75

Abstract: The glass transition of a dense three-dimensional polymer melt is simulated by the bond-fluctuation model on a simple cubic lattice. Combining this model with a two-level Hamiltonian which favours long bonds, a competition between the energetic and topological constraints in the system is created which drastically reduces the tendency of the melt to crystallize and makes the measured quantities depend upon the cooling rate. Our study concentrates on those quantities which are sensitive to structural changes on all length scales in the melt and we address the following questions: How does the precise choice of the cooling rate influence the structure of melt? Does the melt preserve its high temperature fluid-like state when it vitrifies? To what extent does the underlying lattice of the bond-fluctuation model emerge in the calculated quantities? In order to answer these questions we determined the collective static structure factor, the pair-correlation function and the static structure factor of the polymer chains. All of these quantities emphasize that the melt retains its liquid-like, short-range structure when it is cooled through the glass transition. The onset of this freezing can most clearly be distinguished by the isothermal compressibility which we obtained by both the extrapolation of the collective static structure factor to small q-values and by the “block-analysis” method. The results from the isothermal compressibility suggest that the density fluctuations start to freeze in a temperature range around T ≈ 0.25 (the temperature is measured in units of an energy parameter ϵ of the Hamiltonian), which is compatible with our previous analysis of the local properties in this model.

Date: 1994
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/0378437194904170
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:204:y:1994:i:1:p:47-75

DOI: 10.1016/0378-4371(94)90417-0

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().