{"id":{"repo_id":"aston","oai_identifier":"oai:publications.aston.ac.uk:11645"},"canonical_url":"https://search.dev.ndltd.org/etd/aston/oai:publications.aston.ac.uk:11645","repository":{"repo_id":"aston","name":"Aston University","base_url":"https://publications.aston.ac.uk/cgi/oai2"},"display":{"title":"Melting of polymers","abstract":"The project set out to investigate the relative effectiveness of thermal conductive heating (from external resistance heaters) and viscous heating in the heating (and melting) of low density polyethylene. A model system was used in order to simplify the mathematical analysis. A theory was developed to describe both processes in the model apparatus. The results showed large differences between the experimental and predicted results at low melt temperatures (the predicted results were much greater than the experimental) . Analysis of the results indicated that the apparatus was probably not producing the required shear rates in the sample. The theory appeared to be satisfactory, in that it did not over estimate the viscous heating to any significant extent. The theoretical results could therefore be considered to be a reasonable estimate of the viscous heating.","abstract_html":"The project set out to investigate the relative effectiveness of thermal conductive heating (from external resistance heaters) and viscous heating in the heating (and melting) of low density polyethylene. A model system was used in order to simplify the mathematical analysis. A theory was developed to describe both processes in the model apparatus. The results showed large differences between the experimental and predicted results at low melt temperatures (the predicted results were much greater than the experimental) . Analysis of the results indicated that the apparatus was probably not producing the required shear rates in the sample. The theory appeared to be satisfactory, in that it did not over estimate the viscous heating to any significant extent. The theoretical results could therefore be considered to be a reasonable estimate of the viscous heating.","abstract_has_math":false,"creators":["Blundell, Cefn"],"institution":"Aston University","degree_name":"Ph.D.","degree_level":"doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Lovett, A.J.","Jones, M.C.","Learmouth, G.S."],"committee_chairs":[],"committee_members":[],"year":1974,"date_issued":"1974-10","date_published":"1974-10","updated_at":"2026-07-24T01:01:33Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Lovett, A.J.","Jones, M.C.","Learmouth, G.S."]},{"key":"dc:creator","label":"Author","values":["Blundell, Cefn"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1974-10"]},{"key":"dc:date.issued","label":"Date","values":["1974-10"]},{"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/11645/"]},{"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.uri","label":"Identifier URI","values":["https://publications.aston.ac.uk/id/eprint/11645/1/Blund1974_948468.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The project set out to investigate the relative effectiveness of thermal conductive heating (from external resistance heaters) and viscous heating in the heating (and melting) of low density polyethylene. A model system was used in order to simplify the mathematical analysis. A theory was developed to describe both processes in the model apparatus. The results showed large differences between the experimental and predicted results at low melt temperatures (the predicted results were much greater than the experimental) . Analysis of the results indicated that the apparatus was probably not producing the required shear rates in the sample. The theory appeared to be satisfactory, in that it did not over estimate the viscous heating to any significant extent. The theoretical results could therefore be considered to be a reasonable estimate of the viscous heating."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Melting of polymers"]}]}],"canonical_facts":{"dc:contributor.advisor":["Lovett, A.J.","Jones, M.C.","Learmouth, G.S."],"dc:creator":["Blundell, Cefn"],"dc:date":["1974-10"],"dc:date.issued":["1974-10"],"dc:description.abstract":["The project set out to investigate the relative effectiveness of thermal conductive heating (from external resistance heaters) and viscous heating in the heating (and melting) of low density polyethylene. A model system was used in order to simplify the mathematical analysis. A theory was developed to describe both processes in the model apparatus. The results showed large differences between the experimental and predicted results at low melt temperatures (the predicted results were much greater than the experimental) . Analysis of the results indicated that the apparatus was probably not producing the required shear rates in the sample. The theory appeared to be satisfactory, in that it did not over estimate the viscous heating to any significant extent. The theoretical results could therefore be considered to be a reasonable estimate of the viscous heating."],"dc:format":["application/pdf"],"dc:identifier.uri":["https://publications.aston.ac.uk/id/eprint/11645/1/Blund1974_948468.pdf"],"dc:publisher.department":["Chemical Engineering & Applied Chemistry"],"dc:publisher.institution":["Aston University"],"dc:relation.isreferencedby":["https://publications.aston.ac.uk/id/eprint/11645/"],"dc:title":["Melting of polymers"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["doctoral"],"dc:type.qualificationname":["Ph.D."]},"updated_at":"2026-07-24T01:01:33Z"}