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Softening temperature of vulcanized CB reinforced natural rubber

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(@furocious)
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Joined: 12 years ago

Hi All. I intend to determine the softening temperature of carbon black loaded fully vulcanized natural rubber. I need to determine this in order to heat the rubber foam to change its structural characteristics. Can anyone please suggest a suitable method for determining this? And what do you think should be the approximate softening point of such type of rubber?

Thanks!

Farhan

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(@jorgen)
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Joined: 4 years ago

There is an ASTM standard for heat deflection temperature.

Since most elastomers are used above the glass transition temperature, the modulus is a nice continuous function of the applied temperature. I am not so sure you will see a softening point.

-Jorgen

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