I used Moving Die Rheometer (MDR) to determine cure conditions for vulcanization of a HNBR and Tan delta curves using different temperatures.
According to some papers, lower Tan delta value at certain temperature means higher resilience for rubber after curing. In this case, Tan delta value for 170-degree C was lower than 160-degree C with both showing proper vulcanization curves. After cured, I tested tensile strength for both, and they show not much differences in stress, strain, and elongation %.
- Does higher resilience reflect higher tensile strength?
- Do they even have a relationship at all?
- How can I determine the cure conditions to increase elongation? Thanks
This paper may help
Conference Paper Correlating mechanical rubber properties with moving die rhe...
Lwin Thu
you write that according to some papers a lower tan delta temperature indicates better resilience which i would understand as a lower Tg indicates better resilience. But you compare two samples which showed different tan delta values at the curing temperature and find no difference. Have you checked for the Tg? In my opinion it is to be expected, that the tan delta is (slightly) lower at higher temperatures. For your system, cured at different but close temperatures, i would not expect a difference in Tg.
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