| Abstract: This paper explored the relationship of EPDM foaming mateial between the hardness and springrate ratio by experiment，discussed the relation between the stiffness and foaming material vibration performance, judged its vibration. determine its vibration. It is found that hardness and springrate ratio all showed a trend of increase with the increase of N330, N550 content. The hardness filled N550 than filled N330 large with the same amount, while the springrate ratio showed opposite trend. Hardness is gradually increasing with the increase of dosage of sulfur, springrate ratio than decreasing trends; Increases gradually with the increase of dosage of DCP, hardness, springrate ratio than showed a trend of decrease after the first increase, and there was a minimum value in the dosage for three, and DCP vulcanization of EPDM foaming material of springrate ratios larger than sulfur vulcanization. In order to study the relationship between hardness and springrate ratio of EPDM foaming material activity, we selected the filling system and vulcanization system, explored the associated vulcanization characteristics, Mooney viscosity, crosslinking density, foaming ratio and hardness, analyzed hardness and the trend of springrate ratio. |
