Accelerated long-term ageing of natural rubber vulcanisates Part 2. Results from ageing tests at 40 C


Citation

Barker L. R., . Accelerated long-term ageing of natural rubber vulcanisates Part 2. Results from ageing tests at 40 C. pp. 266-274. ISSN 0127-7065

Abstract

Studies of the influence of temperature on oven-ageing performance of black-filled natural rubber compounds vulcanised with conventional semi-EV EV and mixed Novor/sulphur curing systems have continued with testing at 40C. With conventional and semi-EV vulcanisates it was confirmed that the time to 80 retention of tensile strength followed an Arrhenius-type relationship but performance was above expectation for the EV compound. After five years at 40C tensile strength of the Novor/sulphur compound was still more than 80 of the unaged value as would be expected from ageing tests at higher temperatures. This compound also showed a tendency to increased modulus and longer fatigue life after ageing at 40C as has been observed at higher ageing temperatures.


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Abstract

Studies of the influence of temperature on oven-ageing performance of black-filled natural rubber compounds vulcanised with conventional semi-EV EV and mixed Novor/sulphur curing systems have continued with testing at 40C. With conventional and semi-EV vulcanisates it was confirmed that the time to 80 retention of tensile strength followed an Arrhenius-type relationship but performance was above expectation for the EV compound. After five years at 40C tensile strength of the Novor/sulphur compound was still more than 80 of the unaged value as would be expected from ageing tests at higher temperatures. This compound also showed a tendency to increased modulus and longer fatigue life after ageing at 40C as has been observed at higher ageing temperatures.

Additional Metadata

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Item Type: Article
AGROVOC Term: Natural rubber
AGROVOC Term: Hevea rubber
AGROVOC Term: Vulcanization
AGROVOC Term: High temperature
AGROVOC Term: Ageing
AGROVOC Term: Harness
AGROVOC Term: Compression (process)
AGROVOC Term: Chemical reactions
AGROVOC Term: Tensile strength
AGROVOC Term: Sulphur
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:28
URI: http://webagris.upm.edu.my/id/eprint/23513

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