The Behaviour of Substituted Diaryl Nitroxyl Radicals and their Derivatives as Antifatigue Agents for Rubbers

A variety of arylnitroxyl radicals and their precursors have been evaluated as antifatigue agents, antioxidants and antiozonants in natural rubber. Nitroxyl radicals and their derived hydroxyl amines were shown to be the active species during fatiguing and mechanistic studies using ESR have shown that these stable nitroxyl radicals are regenerated in a cyclicalmechanism, N-nitroso diaryl amines were shown to be highly effective antifatigue agents due in part to the formation and regeneration of the diaryl nitroxyl radicals. Diaryl nitrones were also shown to produce the corresponding nitroxyl radical during processing, although their antifatigue activity was low. However inclusion of a semi-hindered phenolic moiety in the molecule markedly improved activity...

Name dc:type.qualificationname

Ph.D.

Level dc:type.qualificationlevel

doctoral

Grantor dc:publisher.institution

Aston University

Year dc:date.issued

1983

Author dc:creator

• Dweik, Hasan Salah

DOI dc:identifier.doi

https://doi.org/10.48780/publications.aston.ac.uk.00011725

OAI identifier oai:identifier

oai:publications.aston.ac.uk:11725