Intrinsic sulphur content of carbon black and its relevance to rubber vulcanisate analysis


Citation

Davey J. E., . Intrinsic sulphur content of carbon black and its relevance to rubber vulcanisate analysis. pp. 284-287. ISSN 0127-7065

Abstract

This paper describes work carried out to improve the accuracy of any reconstruction of formulation of a black-reinforced rubber article by taking into account the sulphur level associated with the carbon black used in its manufacture. The sulphur content of carbon black can vary from the parts per million level to over the percent level according to the method of manufacture and the feedstock used and this can influence any calculation carried out to reconstruct the original formulation. The carbon black is recovered from natural rubber vulcanisates by pyrolysis under nitrogen and after removal of acid-soluble inorganic fillers the residual sulphur content is determined by a standard furnace combustion followed by titrimetric estimation of the sulphur as sulphate. It has been shown for a series of carbon blacks of various sulphur contents recovered from both conventional cure and EV systems based on NR vulcanisates that this residual sulphur content equates to the intrinsic sulphur content of the virgin black.


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Abstract

This paper describes work carried out to improve the accuracy of any reconstruction of formulation of a black-reinforced rubber article by taking into account the sulphur level associated with the carbon black used in its manufacture. The sulphur content of carbon black can vary from the parts per million level to over the percent level according to the method of manufacture and the feedstock used and this can influence any calculation carried out to reconstruct the original formulation. The carbon black is recovered from natural rubber vulcanisates by pyrolysis under nitrogen and after removal of acid-soluble inorganic fillers the residual sulphur content is determined by a standard furnace combustion followed by titrimetric estimation of the sulphur as sulphate. It has been shown for a series of carbon blacks of various sulphur contents recovered from both conventional cure and EV systems based on NR vulcanisates that this residual sulphur content equates to the intrinsic sulphur content of the virgin black.

Additional Metadata

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Item Type: Article
AGROVOC Term: Natural rubber
AGROVOC Term: Carbon black
AGROVOC Term: Sulphur
AGROVOC Term: Vulcanization
AGROVOC Term: Pyrolysis
AGROVOC Term: reconstruction
AGROVOC Term: Solvent extraction
AGROVOC Term: Chemical analysis (results)
AGROVOC Term: Formulations
AGROVOC Term: Sulphur
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:28
URI: http://webagris.upm.edu.my/id/eprint/23539

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