{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/76364"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/76364","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Thermodynamic properties of polyolefins","abstract":"The purpose of this investigation was to determine thermodynamic properties for linear polyethylene, polypropylene and an ethylenepropylene copolymer, from previously determined p-v-t and calorimetric data. The entropy and enthalpy were calculated from calorimetric and p-v-t data using a datum of entropy and enthalpy equal to zero at 14. 7 pounds per square inch pressure absolute and 32 °F. Entropy and enthalpy were plotted against pressure for a series of isotherms. The values of entropy and enthalpy were then corrected for pressure to arrive at the resultant diagrams. The results are shown in Figures 2, 3, 4, 5, 7, 8, 9, 10, and 11. ln Figures 6, 7, 9, and 10 it can be seen that the thermodynamic properties of polyethylene and polypropylene are very similar up to 240 °F.","abstract_html":"The purpose of this investigation was to determine thermodynamic properties for linear polyethylene, polypropylene and an ethylenepropylene copolymer, from previously determined p-v-t and calorimetric data. The entropy and enthalpy were calculated from calorimetric and p-v-t data using a datum of entropy and enthalpy equal to zero at 14. 7 pounds per square inch pressure absolute and 32 °F. Entropy and enthalpy were plotted against pressure for a series of isotherms. The values of entropy and enthalpy were then corrected for pressure to arrive at the resultant diagrams. The results are shown in Figures 2, 3, 4, 5, 7, 8, 9, 10, and 11. ln Figures 6, 7, 9, and 10 it can be seen that the thermodynamic properties of polyethylene and polypropylene are very similar up to 240 °F.","abstract_has_math":false,"creators":["Waldman, Nathan"],"institution":"Virginia Polytechnic Institute","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Chemical Engineering","degree_department":"Chemical Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1964,"date_issued":"1964","date_published":"1964","updated_at":"2026-07-22T22:20:05Z","subjects":[],"languages":["en_US"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/76364","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Chemical Engineering"]},{"key":"dc:creator","label":"Author","values":["Waldman, Nathan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2017-03-10T21:42:54Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2017-03-10T21:42:54Z"]},{"key":"dc:date.issued","label":"Date","values":["1964"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/76364"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The purpose of this investigation was to determine thermodynamic properties for linear polyethylene, polypropylene and an ethylenepropylene copolymer, from previously determined p-v-t and calorimetric data. The entropy and enthalpy were calculated from calorimetric and p-v-t data using a datum of entropy and enthalpy equal to zero at 14. 7 pounds per square inch pressure absolute and 32 °F. Entropy and enthalpy were plotted against pressure for a series of isotherms. The values of entropy and enthalpy were then corrected for pressure to arrive at the resultant diagrams. The results are shown in Figures 2, 3, 4, 5, 7, 8, 9, 10, and 11. ln Figures 6, 7, 9, and 10 it can be seen that the thermodynamic properties of polyethylene and polypropylene are very similar up to 240 °F."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Thermodynamic properties of polyolefins"]}]}],"canonical_facts":{"dc:contributor.department":["Chemical Engineering"],"dc:creator":["Waldman, Nathan"],"dc:date.accessioned":["2017-03-10T21:42:54Z"],"dc:date.available":["2017-03-10T21:42:54Z"],"dc:date.issued":["1964"],"dc:description.abstract":["The purpose of this investigation was to determine thermodynamic properties for linear polyethylene, polypropylene and an ethylenepropylene copolymer, from previously determined p-v-t and calorimetric data. The entropy and enthalpy were calculated from calorimetric and p-v-t data using a datum of entropy and enthalpy equal to zero at 14. 7 pounds per square inch pressure absolute and 32 °F. Entropy and enthalpy were plotted against pressure for a series of isotherms. The values of entropy and enthalpy were then corrected for pressure to arrive at the resultant diagrams. The results are shown in Figures 2, 3, 4, 5, 7, 8, 9, 10, and 11. ln Figures 6, 7, 9, and 10 it can be seen that the thermodynamic properties of polyethylene and polypropylene are very similar up to 240 °F."],"dc:description.degree":["Master of Science"],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/10919/76364"],"dc:language.iso":["en_US"],"dc:publisher":["Virginia Polytechnic Institute"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Thermodynamic properties of polyolefins"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Chemical Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute"]},"updated_at":"2026-07-22T22:20:05Z"}