Comparison of Rotation, Extrusion, and Compression Plastometers
| Autor: | R. W. Whorlow |
|---|---|
| Rok vydání: | 1954 |
| Předmět: | |
| Zdroj: | Rubber Chemistry and Technology. 27:248-254 |
| ISSN: | 1943-4804 0035-9475 |
| DOI: | 10.5254/1.3543477 |
| Popis: | Instruments expected to give results characteristic of the various classes of plastometer have been compared in a number of respects. The Dillon extrusion plastometer, shearing cone rotation plastometer, and Williams compression plastometer, were compared for their power of discriminating between samples of smoked sheet masticated for different periods, or between samples of MPC carbon black masterbatch remilled for various periods. In the first case, the Dillon instrument was found to be inferior to the other instruments, while for the black masterbatches the Williams instrument was inferior to the other two. The Williams instrument was the most, and the shearing cone the least, influenced by carbon black structure, a result in agreement with the use of the energy expended on the rubber as a measure of structure breakdown. Consideration of the correlation between shearing cone and Dillon plasticity values gives no evidence of marked slippage effects with the extrusion instrument, although it cannot be shown conclusively whether or not slippage occurs with the present form of instrument. It is concluded that a Mooney or shearing cone instrument is probably the best for general use, but that the Dillon instrument may have advantages for tests on carbon black loaded stocks. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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