{"id":{"repo_id":"aston","oai_identifier":"oai:publications.aston.ac.uk:11582"},"canonical_url":"https://search.dev.ndltd.org/etd/aston/oai:publications.aston.ac.uk:11582","repository":{"repo_id":"aston","name":"Aston University","base_url":"https://publications.aston.ac.uk/cgi/oai2"},"display":{"title":"A Study of the Role of Hydroperoxides in the Degradation and Stabilisation of Polymers","abstract":"The photo-degradation mechanism of polyethylene was studied by means of functional group analysis using infrared spectroscopy. The rates of appearance and disappearance of key functional groups such as hydroperoxide, carbonyl, vinylidene, and vinyl formed during the photooxidation of the polymer were studied and compared. The effect of metal complexes, which are supposed to be effective photoactivators for the autoxidation of polyethylene, was also studied. The efficiency of these complexes as well as nitrobenzene and plant pigments as photoactivators in the autoxidation of natural rubber was looked into. The mechanism of action of nitrobenzene in natural rubber was found to be due to the generation of singlet oxygen; the latter causing depolymerisation of the polymer. The technological properties of the soft and viscid products thus obtained were also studied.","abstract_html":"The photo-degradation mechanism of polyethylene was studied by means of functional group analysis using infrared spectroscopy. The rates of appearance and disappearance of key functional groups such as hydroperoxide, carbonyl, vinylidene, and vinyl formed during the photooxidation of the polymer were studied and compared. The effect of metal complexes, which are supposed to be effective photoactivators for the autoxidation of polyethylene, was also studied. The efficiency of these complexes as well as nitrobenzene and plant pigments as photoactivators in the autoxidation of natural rubber was looked into. The mechanism of action of nitrobenzene in natural rubber was found to be due to the generation of singlet oxygen; the latter causing depolymerisation of the polymer. The technological properties of the soft and viscid products thus obtained were also studied.","abstract_has_math":false,"creators":["Tillerkeratne, Liyanarachchige M.K."],"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":1977,"date_issued":"1977-10","date_published":"1977-10","updated_at":"2026-07-24T01:01:30Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://doi.org/10.48780/publications.aston.ac.uk.00011582","outbound_label":"DOI","outbound_source":"dc:identifier.doi"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Tillerkeratne, Liyanarachchige M.K."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1977-10"]},{"key":"dc:date.issued","label":"Date","values":["1977-10"]},{"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/11582/"]},{"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.00011582"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://publications.aston.ac.uk/id/eprint/11582/1/Tillekeratne_Liyanarachchige_Mahasen_Keerthi_1977_reduced_234168.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The photo-degradation mechanism of polyethylene was studied by means of functional group analysis using infrared spectroscopy. The rates of appearance and disappearance of key functional groups such as hydroperoxide, carbonyl, vinylidene, and vinyl formed during the photooxidation of the polymer were studied and compared. The effect of metal complexes, which are supposed to be effective photoactivators for the autoxidation of polyethylene, was also studied. The efficiency of these complexes as well as nitrobenzene and plant pigments as photoactivators in the autoxidation of natural rubber was looked into. The mechanism of action of nitrobenzene in natural rubber was found to be due to the generation of singlet oxygen; the latter causing depolymerisation of the polymer. The technological properties of the soft and viscid products thus obtained were also studied."]},{"key":"dc:format","label":"Dc Format","values":["text"]},{"key":"dc:title","label":"Title","values":["A Study of the Role of Hydroperoxides in the Degradation and Stabilisation of Polymers"]}]}],"canonical_facts":{"dc:creator":["Tillerkeratne, Liyanarachchige M.K."],"dc:date":["1977-10"],"dc:date.issued":["1977-10"],"dc:description.abstract":["The photo-degradation mechanism of polyethylene was studied by means of functional group analysis using infrared spectroscopy. The rates of appearance and disappearance of key functional groups such as hydroperoxide, carbonyl, vinylidene, and vinyl formed during the photooxidation of the polymer were studied and compared. The effect of metal complexes, which are supposed to be effective photoactivators for the autoxidation of polyethylene, was also studied. The efficiency of these complexes as well as nitrobenzene and plant pigments as photoactivators in the autoxidation of natural rubber was looked into. The mechanism of action of nitrobenzene in natural rubber was found to be due to the generation of singlet oxygen; the latter causing depolymerisation of the polymer. 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