{"created":"2023-05-15T14:53:30.697556+00:00","id":72871,"links":{},"metadata":{"_buckets":{"deposit":"15529fb2-6624-4dac-89e3-3bbd4cd1e82f"},"_deposit":{"created_by":1,"id":"72871","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"72871"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00072871","sets":["10:28"]},"author_link":["718030","718032","718033","718034","718027","718031","718029","718026","718028"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2018-08-20","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Different kinds of polyethylene were subjected to uniaxial deformation and their structural evolution was investigated by positron annihilation lifetime spectroscopy (PALS) and coincident Doppler broadening spectroscopy (CDB).  The pick-off annihilation lifetime of ortho-positronium (o-Ps) was progressively shortened by deformation, possibly due to anisotropic elongation of the free volume and enhanced overlap of the o-Ps wavefunction with the surrounding polyethylene molecules. The anisotropy elongation of the free volume in deformed polyethylene was also implied by CDB. The intensity of o-Ps was enhanced in high density polyethylene (HDPE) and ultra-high-molecular-weight polyethylene (UHMWPE) by deformation, but not in low density polyethylene (LDPE). This suggests that the destruction of crystallites may play a significant role in the deformation of HDPE and UHMWPE but not in LDPE. Comparison of the PALS data, obtained with two specimens sandwiching the positron source, with those obtained with a single specimen by using a commercial PALS system recently developed by Yamawaki et al confirmed the usefulness of the commercial PALS system in the study of deformed polymers.","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"18th International Conference on Positron Annihilation(ICPA2018)","subitem_description_type":"Other"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Y.Kobayashi"}],"nameIdentifiers":[{"nameIdentifier":"718026","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yamawaki, M."}],"nameIdentifiers":[{"nameIdentifier":"718027","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Oka, T."}],"nameIdentifiers":[{"nameIdentifier":"718028","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Sato, K."}],"nameIdentifiers":[{"nameIdentifier":"718029","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Uesugi, N."}],"nameIdentifiers":[{"nameIdentifier":"718030","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hattori, K."}],"nameIdentifiers":[{"nameIdentifier":"718031","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nagasawa, N."}],"nameIdentifiers":[{"nameIdentifier":"718032","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Washio, M."}],"nameIdentifiers":[{"nameIdentifier":"718033","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"長澤 尚胤","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"718034","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"Structural Evolution in Deformed Polyethylene Studied with Positrons","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Structural Evolution in Deformed Polyethylene Studied with Positrons"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-07-23"},"publish_date":"2018-07-23","publish_status":"0","recid":"72871","relation_version_is_last":true,"title":["Structural Evolution in Deformed Polyethylene Studied with Positrons"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T19:35:11.438337+00:00"}