ASTM D6049-03Standard Test Method for Rubber Property—Measurement of the Viscous and Elastic Behavior of Unvulcanized Raw Rubbers and Rubber Compounds by Compression Between Parallel Plates
This test method is capable of measuring and characterizing the rheological behavior (viscosity and elasticity) of unvulcanized raw rubbers and rubber compounds, relating to the macro structure of rubber polymers (average molecular weight, molecular weight distribution, long chain branching, and micro- and macro-gel). This test method is an adaptation of the German Standard DIN 53514, a further development of the former "Defo Test".
Before conducting ASTM D6049, it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.