Resistance of Compacfoam to Benzine Diesel Sulphur dioxide Nitrogen oxide

In order to test the influence of gaseous media on the alteration of Compacfoam, test bodies (measurements: 25mm x 25mm x 50mm) were stored 30 or 60 days at a temperature of 60ºC in the media listed. Table 2 displays the designations used below of the types of exposure.

Test medium:

K_0 ambient air

K_1_2 sulphur dioxide, nitrogen dioxide

K_3 diesel fuel

K_4 carburator benzine fuel with benzene

Test medium Temperature [°C] Duration of exposure [d]
K_0 20 0
K_0 60 30
K_0 60 60
K_1_2 60 30
K_1_2 60 60
K_3 60 30
K_3 60 60
K_4 60 30
K_4 60 60

After exposure the influence on the following mechanical variables was calculated:

Relative ductility

Relative strength

Relative stiffness

Mass and shape

On the basis of the trial results obtained for the different exposures no striking influence was detected on the mechanical properties of HD-EPS. The alteration of the mechanical properties detected from the exposure used as a basis is located in the scatter range of the experimental data. Hence the influence of exposure considering the characteristics of the exposure (medium, temperature and duration) can be classified as negligible.

Source: Innsbruck University, Department for Materials Technology, 2010

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