Standard Test Method for Rubber Compounds—Measurement of Unvulcanized Dynamic Strain Softening (Payne Effect) Using Sealed Cavity Rotorless Shear Rheometers

Importancia y uso:

5.1 This test method is used to measure viscoelastic properties through the strain softening effects of a strain amplitude sweep (the Payne Effect).

5.2 For the uncured state, the time conditioning and strain amplitude strain sweeps can relate to colloidal silica particle or carbon black deagglomeration from the mixing process. The profile of this Payne Effect from G’ storage modulus can also be a function of loading levels and particle size of these fillers in the rubber hydrocarbon medium. In addition, with silica and an organosilane additive, this G’ strain softening effect can determine if a given silanization reaction between a subject silica and an organosilane was achieved through reactive mixing. If the silanization reaction during the mixing was not achieved, the maximum G’ storage modulus from the strain sweep will not be lowered and the silica particle attraction to other silica particles will still be high resulting in a more dense filler network that remains.

Subcomité:

D11.12

Referida por:

D8362-21, D7723-24, D8491-23

Volúmen:

09.01

Número ICS:

83.060 (Rubber)

Palabras clave:

loss modulus; loss tangent; Mullins Effect; Payne Effect; processability test; rheological properties; rotorless oscillating shear rheometer; storage modulus; strain softening effect; tan delta; tangent delta; VE ratio; viscosity;