{"created":"2023-05-15T16:30:00.116444+00:00","id":969,"links":{},"metadata":{"_buckets":{"deposit":"6b45dd88-a4ab-4992-82ed-75b7c1dd57c3"},"_deposit":{"created_by":2,"id":"969","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"969"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00000969","sets":["14:21"]},"author_link":["4658","4654","4655","4656","4657"],"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2017-03-16","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"12","bibliographicPageEnd":"2010","bibliographicPageStart":"2004","bibliographicVolumeNumber":"55","bibliographic_titles":[{"bibliographic_title":"Journal of Polymer Science Part A: Polymer Chemistry"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We have demonstrated a hydrolysis reaction of polyurethane (PU) under high pressure of carbon dioxide (CO2) in water. We employed the PU sample, poly(methylene bis-(1,4-phenylene)hexamethylene dicarbamate), denoted as M-PU, which was synthesized from 4,4′-diphenyl methane diisocyanate and 1,4-butane diol (BD). The optimum hydrolysis reaction condition was 190 °C under CO2 pressures over 4.1 MPa in water medium, and 93% hydrolysis of M-PU was achieved. After the reaction, the water-soluble parts were obtained, and isolated by column chromatography. The isolated products were 4,4′-methylenedianiline (MDA) and 1,4-butane diol (BD), which were components of repeating unit of M-PU. In addition, the hydrolysis reaction gave no byproduct. This hydrolysis under high pressure of CO2 with water is a reaction by which M-PU is selectively hydrolyzed into MDA and BD by cleaving urethane linkage. Moreover, the resulting hydrolyzed products were easily obtained by evaporation of aqueous layer after the reaction, indicating an efficient chemical recycling of PU was achieved.","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"Journal of Polymer Science Part A: Polymer Chemistry, 55(12), pp.2004-2010; 2017","subitem_description_type":"Other"}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Wiley Periodicals, Inc."}]},"item_2_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1002/pola.28576","subitem_relation_type_select":"DOI"}}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"c 2017 Wiley Periodicals, Inc. This is the peer reviewed version of the following article: Journal of Polymer Science Part A: Polymer Chemistry, 55(12), pp.2004-2010; 2017,  which has been published in final form at https://doi.org/10.1002/pola.28576. This article may be used for non-commercial purposes  in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions."}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0887624X","subitem_source_identifier_type":"ISSN"}]},"item_2_version_type_16":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Motokucho, Suguru"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yamaguchi, Akito"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nakayama, Yu"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Morikawa, Hiroshi"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nakatani, Hisayuki"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-18"}],"displaytype":"detail","filename":"JPSpartA55_2004.pdf","filesize":[{"value":"650.0 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"JPSpartA55_2004.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/969/files/JPSpartA55_2004.pdf"},"version_id":"4057990f-a70d-4d51-a14d-9e689c69649a"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"carbon dioxide","subitem_subject_scheme":"Other"},{"subitem_subject":"carbonic acid","subitem_subject_scheme":"Other"},{"subitem_subject":"degradation","subitem_subject_scheme":"Other"},{"subitem_subject":"polyurethanes","subitem_subject_scheme":"Other"},{"subitem_subject":"recycling","subitem_subject_scheme":"Other"}]},"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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Hydrolysis of aromatic polyurethane in water under high pressure of CO2","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Hydrolysis of aromatic polyurethane in water under high pressure of CO2"}]},"item_type_id":"2","owner":"2","path":["21"],"pubdate":{"attribute_name":"公開日","attribute_value":"2020-08-18"},"publish_date":"2020-08-18","publish_status":"0","recid":"969","relation_version_is_last":true,"title":["Hydrolysis of aromatic polyurethane in water under high pressure of CO2"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2023-05-16T04:10:03.904020+00:00"}