Standard Test Method for Rubber Property—Macro-Dispersion of Fillers in Compounds

Importancia y uso:

5.1 The incorporation of fillers into the rubber matrix is characterized by their macro-dispersion as an indicator of the quality of mixing. This test method provides a measure of the macro-dispersion of reinforcing fillers, like silica and carbon black, as well as of inert fillers. Based on their polymer nature, different types of rubbers can show a different degree of acceptance for the incorporation of fillers, as indicated by their macro-dispersion.

5.2 Macro-dispersion of carbon black and silica in rubber compounds may be measured by different methods. Carbon black provides a direct physical reinforcement; silica requires a silane coupling agent in order to initiate reinforcement, and therefore, a different technology of mixing. Silica is also a non-conductor, making electrical methods of dispersion measurement impracticable. This test method is specifically appropriate for the characterization of the macro-dispersion in silica technology.

5.3 This test method also can measure the mixing quality of colored rubbers. It uses variable exposure in order to be able to image a wide range of colors.

5.4 This test method is intended for use in research and development as well as in quality control of filler processability in rubber and may be used for both the evaluation of production processes or referee purposes.

Subcomité:

D11.12

Volúmen:

09.01

Número ICS:

87.060.10 (Pigments and extenders)

Palabras clave:

filler; incorporation; macro-dispersion; micro-roughness; reflected light microscope;