{"id":{"repo_id":"aston","oai_identifier":"oai:publications.aston.ac.uk:11725"},"canonical_url":"https://search.dev.ndltd.org/etd/aston/oai:publications.aston.ac.uk:11725","repository":{"repo_id":"aston","name":"Aston University","base_url":"https://publications.aston.ac.uk/cgi/oai2"},"display":{"title":"The Behaviour of Substituted Diaryl Nitroxyl Radicals and their Derivatives as Antifatigue Agents for Rubbers","abstract":"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...","abstract_html":"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...","abstract_has_math":false,"creators":["Dweik, Hasan Salah"],"institution":"Aston University","degree_name":"Ph.D.","degree_level":"doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1983,"date_issued":"1983","date_published":"1983","updated_at":"2026-07-24T01:01:35Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://doi.org/10.48780/publications.aston.ac.uk.00011725","outbound_label":"DOI","outbound_source":"dc:identifier.doi"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Dweik, Hasan Salah"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1983"]},{"key":"dc:date.issued","label":"Date","values":["1983"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Chemical Engineering & Applied Chemistry"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["Aston University"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://publications.aston.ac.uk/id/eprint/11725/"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["Ph.D."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.doi","label":"DOI","values":["10.48780/publications.aston.ac.uk.00011725"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://publications.aston.ac.uk/id/eprint/11725/1/Dweik_1983_reduced.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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..."]},{"key":"dc:format","label":"Dc Format","values":["text"]},{"key":"dc:title","label":"Title","values":["The Behaviour of Substituted Diaryl Nitroxyl Radicals and their Derivatives as Antifatigue Agents for Rubbers"]}]}],"canonical_facts":{"dc:creator":["Dweik, Hasan Salah"],"dc:date":["1983"],"dc:date.issued":["1983"],"dc:description.abstract":["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..."],"dc:format":["text"],"dc:identifier.doi":["10.48780/publications.aston.ac.uk.00011725"],"dc:identifier.uri":["https://publications.aston.ac.uk/id/eprint/11725/1/Dweik_1983_reduced.pdf"],"dc:publisher.department":["Chemical Engineering & Applied Chemistry"],"dc:publisher.institution":["Aston University"],"dc:relation.isreferencedby":["https://publications.aston.ac.uk/id/eprint/11725/"],"dc:title":["The Behaviour of Substituted Diaryl Nitroxyl Radicals and their Derivatives as Antifatigue Agents for Rubbers"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["doctoral"],"dc:type.qualificationname":["Ph.D."]},"updated_at":"2026-07-24T01:01:35Z"}