Standard Practice for Qualitative Identification of Polymers in Emulsion Paints

Importancia y uso:

5.1 Identification of specific acrylic polymers in emulsion paints is often difficult or impossible by infrared alone. This is particularly true when the acrylic is present in a small amount as a comonomer with vinyl acetate, or when blended with alkyds or other ester systems. If identification of an acrylic component is required in such a system, it may often be accomplished by gas-liquid chromatographic analysis of the pyrolyzed paint film. The presence of a number of other polymers may often also be confirmed by pyrolysis since they produce characteristic and reproducible pyrograms.

5.2 The pyrograms obtained from unknown samples vary in complexity according to the sample composition. It is necessary to establish the presence or absence of as many components as possible from a study of the infrared spectra obtained in the first part of this practice. The gas-liquid chromatography results may then be used to help identify any unknown components present and to confirm identifications made by infrared.

Subcomité:

D01.21

Referida por:

D4143-16R22, D6577-24, D6763-16R22, D5324-16R22, D5098-16R21

Volúmen:

06.01

Número ICS:

87.040 (Paints and varnishes)

Palabras clave:

emulsion paints; gas chromatography; infrared analysis; paint vehicle; polymers; pyrolysis;