Thermodynamic Affinity of Elastomer-Solvent System and Barrier Properties of Elastomer Materials

• Authors: S. Krzemińska , W. Rzymski
• Languages of publication: EN

Abstracts

EN

The aim of the study was to determine whether it is possible to correlate directly the barrier properties of elastomer materials assessed on the basis of the breakthrough time t_{p} with the thermodynamic affinity of the elastomer-solvent system, characterized by their solubility parameters δ. According to EN ISO 6529:2001 standard, breakthrough time is defined as the time elapsing from the moment that the tested material sample gets in contact with the chemical to the moment in that a specified amount of the substance appears on the other side of the sample. Cured butyl rubber (IIR) in the form of flat membranes were tested in the study. For the nonpolar rubber-polar or rubber-nonpolar solvent systems it has been found that significant differences in rubber and solvent solubility parameters not in every case leads to better resistance to permeation. The properties of the permeating chemical and the rubber, including its polarity, shape, and molecule dimension of the solvent, are of considerable importance. A marked disparity of breakthrough times were observed for the permeation of polar or nonpolar solvents despite similar values of their solvent solubility parameter. The breakthrough time of the solvent from the homologous series (pentane, hexane and heptane) is determined not only by the rubber and solvent solubility parameters but by the size of the chemical molecule as well. Therefore, for the assessment of material barrier properties the thermodynamic affinity or dissimilarity of the elastomer and the permeating solvent is only semiquantitative in character.

Keywords

EN

82.60.Lf; 61.25.hp; 64.75.Bc; 81.05.Lg

Discipline

• 61.25.hp: Polymer swelling, cross linking
• 81.05.Lg: Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials(for polymers and organic materials in electrochemistry, see 82.45.Wx)
• 64.75.Bc: Solubility
• 82.60.Lf: Thermodynamics of solutions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 1
• Pages: 146-150

Dates

published

2013-07

received

2012-11-06

(unknown)

2013-04-05

Contributors

author

S. Krzemińska

• Central Institute for Labour Protection - National Research Institute (CIOP-PIB) , Department of Personal Equipment, Wierzbowa 48, 90-133 Lódź, Poland

author

W. Rzymski

• Łódź University of Technology, Institute of Polymer and Dye Technology, B. Stefanowskiego 12/16, 90-924 Lódź, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.124.146