| 초록 |
Abrasion by a DIN abrader are compared and contrasted with those obtained using a blade scraper for several representative elastomers: NR, SBR(23.5% styrene) and cis-polybutadiene (BR), using both unfilled and carbon-black-filled compounds. The results obtained from a DIN abrader were found to be less sensitive to the amount of frictional work, and less discriminating between different compounds, than those obtained with a blade scraper. These differences are attributed to somewhat different mechanics of tearing in the two cases, even when the same fracture criterion is employed. For a blade, the length of the contact line is unchanged as the applied load increases, whereas for an asperity an increase in load causes an increase in length of the contact area, tending to mitigate the effect of the increased load. |
