This International Standard specifies two empirical methods for the quantitative determination of the loss of
mass from a plastic material under defined conditions of time and temperature, in the presence of activated
carbon.
These methods are used, in particular, for the quantitative determination of the loss on heating of plasticizers
from plasticized plastic materials, in which case it is generally assumed that no significant amounts of other
volatile materials are present.
These are empirical test methods, suitable only for a rather rapid comparison of the losses of plasticizers or, in
general, of volatile compounds, from different plastics.
They may also be employed for the comparison of different types of plasticizers; in this case, standard
compounds should be prepared, on the basis of a well characterized resin, with known ratios of resin to
plasticizer.
NOTE These comparisons are possible only if the test specimens are of the same thickness. If it can be assumed
that, after reconditioning, the moisture content of the exposed specimens is equal to that obtaining after the original
conditioning, the effect of moisture may be ignored.
Two methods are specified:
Method A: The test specimens are in direct contact with the carbon; this method is particularly useful
for materials that have to be tested at relatively low temperatures because they flow at
higher temperatures.
Method B: The test specimens are placed in wire cages that prevent direct contact between the test
specimens and the carbon.
Diese Internationale Norm legt zwei empirische Verfahren für die quantitative Bestimmung des Masseverlusts bei einem Kunststoff unter festgelegten Zeit- und Temperaturbedingungen in Gegenwart von Aktivkohle fest. Die Verfahren werden besonders für die quantitative Bestimmung der Weichmacherabgabe aus weichmacherhaltigen Kunststoffen beim Erwärmen angewendet, wobei allgemein angenommen wird, dass keine bedeutenden Mengen von anderen flüchtigen Stoffen anwesend sind. Diese Prüfverfahren sind empirisch und nur für einen relativ schnellen Vergleich der Abgabe von Weichmachern oder im Allgemeinen von flüchtigen Verbindungen aus unterschiedlichen Kunststoffen geeignet.