{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/45399"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/45399","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Effect of photoageing and plasticizer content on the mechanical and adhesive properties of polyvinylbutyral","abstract":"The objective of this study is to characterize the mechanical and adhesive properties of polyvinylbutyral and determine the effect of plasticizer content and photoageing on these properties. This data would be used to understand how the performance of laminated safety glass is related to the choice of adhesive interlayer. Samples of PVB plasticized with 0 to 40% butyl benzyl phthalate by weight were analyzed using a single strain rate tensile test, dynamic mechanical thermal analysis and a 1350 peel test. Two regimes of behavior were identified. PVB with low plasticizer contents, up to 10%, acts as a glassy polymer at room temperature. At higher plasticizer concentrations, greater than 20%, the material becomes elastomeric, with increased ductility and decreased moduli. The adhesive strength of each of the formulations was similar if compared at their respective glass transition temperatures. At room temperature, the heavily plasticized formulations had good adhesive strength whereas the less plasticized formulations readily debonded from the glass. These results suggest that PVB plasticized with between 20 and 40% plasticizer content is highly suitable as an interlayer material. UV radiation exposure was used to simulate the effect of sunlight on PVB. Forty micron thick samples were irradiated for up to 1000 hours of exposure time and analyzed using FTIR spectroscopy. It was determined that photo degradation had occurred in the form of a breakdown of the acetal ring structure in the vinyl butyral function. Similar treatment of 0.75 mm thick samples produced no major degradation in the mechanical or adhesive properties of the material. This is an unexpected result that conflicts with the obvious degradation discovered during FTIR spectroscopic testing. This is most likely due to the increased thickness of the mechanical samples and corresponding lo\\ver UV dosage per polymer chain.","abstract_html":"The objective of this study is to characterize the mechanical and adhesive properties of polyvinylbutyral and determine the effect of plasticizer content and photoageing on these properties. This data would be used to understand how the performance of laminated safety glass is related to the choice of adhesive interlayer. Samples of PVB plasticized with 0 to 40% butyl benzyl phthalate by weight were analyzed using a single strain rate tensile test, dynamic mechanical thermal analysis and a 1350 peel test. Two regimes of behavior were identified. PVB with low plasticizer contents, up to 10%, acts as a glassy polymer at room temperature. At higher plasticizer concentrations, greater than 20%, the material becomes elastomeric, with increased ductility and decreased moduli. The adhesive strength of each of the formulations was similar if compared at their respective glass transition temperatures. At room temperature, the heavily plasticized formulations had good adhesive strength whereas the less plasticized formulations readily debonded from the glass. These results suggest that PVB plasticized with between 20 and 40% plasticizer content is highly suitable as an interlayer material. UV radiation exposure was used to simulate the effect of sunlight on PVB. Forty micron thick samples were irradiated for up to 1000 hours of exposure time and analyzed using FTIR spectroscopy. It was determined that photo degradation had occurred in the form of a breakdown of the acetal ring structure in the vinyl butyral function. Similar treatment of 0.75 mm thick samples produced no major degradation in the mechanical or adhesive properties of the material. This is an unexpected result that conflicts with the obvious degradation discovered during FTIR spectroscopic testing. This is most likely due to the increased thickness of the mechanical samples and corresponding lo\\ver UV dosage per polymer chain.","abstract_has_math":false,"creators":["May, Raymond Jeffrey"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Materials Science and Engineering","degree_department":"Materials Science and Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":["Love, Brian J."],"committee_members":["Kander, Ronald G.","Dillard, David A."],"year":1996,"date_issued":"1996","date_published":"1996","updated_at":"2026-07-22T22:19:49Z","subjects":["polyvinylbutyral","photoageing","safety glass","UV degradation","modulus"],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-11012008-063404"],"render_values":[{"text":"etd-11012008-063404","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/45399","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Love, Brian J."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Kander, Ronald G.","Dillard, David A."]},{"key":"dc:contributor.department","label":"Department","values":["Materials Science and Engineering"]},{"key":"dc:creator","label":"Author","values":["May, Raymond Jeffrey"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-03-14T21:48:42Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-03-14T21:48:42Z","2008-11-01"]},{"key":"dc:date.issued","label":"Date","values":["1996"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"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":["Materials Science and 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 and State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["polyvinylbutyral","photoageing","safety glass","UV degradation","modulus"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"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.other","label":"Dc Identifier Other","values":["etd-11012008-063404"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/45399"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The objective of this study is to characterize the mechanical and adhesive properties of polyvinylbutyral and determine the effect of plasticizer content and photoageing on these properties. This data would be used to understand how the performance of laminated safety glass is related to the choice of adhesive interlayer. Samples of PVB plasticized with 0 to 40% butyl benzyl phthalate by weight were analyzed using a single strain rate tensile test, dynamic mechanical thermal analysis and a 1350 peel test. Two regimes of behavior were identified. PVB with low plasticizer contents, up to 10%, acts as a glassy polymer at room temperature. At higher plasticizer concentrations, greater than 20%, the material becomes elastomeric, with increased ductility and decreased moduli. The adhesive strength of each of the formulations was similar if compared at their respective glass transition temperatures. At room temperature, the heavily plasticized formulations had good adhesive strength whereas the less plasticized formulations readily debonded from the glass. These results suggest that PVB plasticized with between 20 and 40% plasticizer content is highly suitable as an interlayer material. UV radiation exposure was used to simulate the effect of sunlight on PVB. Forty micron thick samples were irradiated for up to 1000 hours of exposure time and analyzed using FTIR spectroscopy. It was determined that photo degradation had occurred in the form of a breakdown of the acetal ring structure in the vinyl butyral function. Similar treatment of 0.75 mm thick samples produced no major degradation in the mechanical or adhesive properties of the material. This is an unexpected result that conflicts with the obvious degradation discovered during FTIR spectroscopic testing. This is most likely due to the increased thickness of the mechanical samples and corresponding lo\\ver UV dosage per polymer chain."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["BTD"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Effect of photoageing and plasticizer content on the mechanical and adhesive properties of polyvinylbutyral"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Love, Brian J."],"dc:contributor.committeemember":["Kander, Ronald G.","Dillard, David A."],"dc:contributor.department":["Materials Science and Engineering"],"dc:creator":["May, Raymond Jeffrey"],"dc:date.accessioned":["2014-03-14T21:48:42Z"],"dc:date.available":["2014-03-14T21:48:42Z","2008-11-01"],"dc:date.issued":["1996"],"dc:description.abstract":["The objective of this study is to characterize the mechanical and adhesive properties of polyvinylbutyral and determine the effect of plasticizer content and photoageing on these properties. This data would be used to understand how the performance of laminated safety glass is related to the choice of adhesive interlayer. Samples of PVB plasticized with 0 to 40% butyl benzyl phthalate by weight were analyzed using a single strain rate tensile test, dynamic mechanical thermal analysis and a 1350 peel test. Two regimes of behavior were identified. PVB with low plasticizer contents, up to 10%, acts as a glassy polymer at room temperature. At higher plasticizer concentrations, greater than 20%, the material becomes elastomeric, with increased ductility and decreased moduli. The adhesive strength of each of the formulations was similar if compared at their respective glass transition temperatures. At room temperature, the heavily plasticized formulations had good adhesive strength whereas the less plasticized formulations readily debonded from the glass. These results suggest that PVB plasticized with between 20 and 40% plasticizer content is highly suitable as an interlayer material. UV radiation exposure was used to simulate the effect of sunlight on PVB. Forty micron thick samples were irradiated for up to 1000 hours of exposure time and analyzed using FTIR spectroscopy. It was determined that photo degradation had occurred in the form of a breakdown of the acetal ring structure in the vinyl butyral function. Similar treatment of 0.75 mm thick samples produced no major degradation in the mechanical or adhesive properties of the material. This is an unexpected result that conflicts with the obvious degradation discovered during FTIR spectroscopic testing. This is most likely due to the increased thickness of the mechanical samples and corresponding lo\\ver UV dosage per polymer chain."],"dc:description.degree":["Master of Science"],"dc:format.medium":["BTD"],"dc:format.mimetype":["application/pdf"],"dc:identifier.other":["etd-11012008-063404"],"dc:identifier.uri":["http://hdl.handle.net/10919/45399"],"dc:language.iso":["en"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["polyvinylbutyral","photoageing","safety glass","UV degradation","modulus"],"dc:title":["Effect of photoageing and plasticizer content on the mechanical and adhesive properties of polyvinylbutyral"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Materials Science and Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:19:49Z"}