Standard Test Methods for Rubber—Measurement of Processing Properties Using Capillary Rheometry

Importancia y uso:

4.1 These test methods are useful for characterization of raw, or compounded, unvulcanized rubber in terms of viscosity, or resistance to flow.

4.2 The data produced by these test methods have been found useful for both quality control tests and compound development. However, direct correlation with factory conditions is not implied.

4.3 Flow performance data permits quality control of incoming raw rubbers because the flow parameters are sensitive to molecular weight and to molecular weight distribution. Therefore, these test methods may distinguish differences between lots.

4.4 The shear viscosity or flow viscosity of compounded rubber batches in the raw (unvulcanized) state will not only be sensitive to the raw polymer molecular properties, but will also be affected by type and amount of filler, plasticizer or softener levels, amount and type of copolymer blend, and other compounding materials. These test methods can serve as a quality control tool for either incoming custom mixed compounds or for in-house quality assurance checks on production mixing. These test methods are useful for research and development of new products by measuring the rheological effect on a rubber compound of new polymers, resins, softeners, etc.

Subcomité:

D11.12

Referida por:

D5782-18, D5783-18, D5876_D5876M-17R24

Volúmen:

09.01

Número ICS:

83.060 (Rubber)

Palabras clave:

capillary rheometer; flow properties; piston; processing properties; screw extrusion; shear rate; shear stress; viscosity;