{"created":"2023-05-15T11:58:21.077810+00:00","id":4333,"links":{},"metadata":{"_buckets":{"deposit":"1f9236fc-2e7b-4e10-b5be-4a25f355b5cd"},"_deposit":{"created_by":18,"id":"4333","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"4333"},"status":"published"},"_oai":{"id":"oai:kyutech.repo.nii.ac.jp:00004333","sets":["6:7"]},"author_link":[],"item_20_date_granted_61":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2015-09-25"}]},"item_20_degree_grantor_59":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"九州工業大学"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"17104","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_20_degree_name_58":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）"}]},"item_20_description_30":{"attribute_name":"目次","attribute_value_mlt":[{"subitem_description":"1. Introduction||2. Chapter 2. Experimental methods||3. Zinc xanthates with varying alkyl chains on curing||4. Effect of Alkyl-metal xanthates with varying metals on curing of epoxy resin||5. Investigation with gallium (III) xanthate and standard catalyst||6. General Conclusion","subitem_description_type":"TableOfContents"}]},"item_20_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Cured epoxy resins have emerged as one of the most demanding industrial materials due to their properties such as high stiffness, adhesive nature and environmental stability. Their versatile nature makes it valuable with tremendous application potential ranging from sports goods to aerospace industry.Cured epoxy is a product of processed epoxy oligomer or polymer into a three dimension network generated by employing curing catalysts. The conventional curing catalysts however suffer from serious drawback of premature curing even undesired at ambient conditions limiting its pot-life. Therefore utilization of latent catalyst for thermoset applications is highly desired to extend the working life of a formulated mixture by passivating the activity of the catalyst until triggered by the external stimulus. The impetus for using latent catalysts is to impart the ability for developing the fully formulated resin systems with long storage life that can be applied directly by the end user. This, in turn, helps guaranteed consistency and improve process efficiency. To attain this, core shell encapsulation or matrix encapsulation are being currently used but they suffer from the problems like diffusion through the thermoset after release and sluggish release kinetics respectively.We have found that metal sulfides exhibit the curing of epoxy resin composite like conventionally used acid and base catalysts. Normally such catalyst start reacting immediately having limitation on the pot-life. Since metal sulfides are generally insoluble in the solvent and by homogeneously mixing with the ingredients of the epoxy resin composite their latent catalytic property cannot be effectively utilized. Metal xanthates are well known soluble precursors for the metal sulfides whose solubility can be controlled by judicious modification of alkyl chain. Just upon heating to the threshold temperature, they generate the metal sulfide in the system releasing only the gaseous bi-products.This dynamic latent capability of metal xanthates to form catalytically active metal sulfides was put to use in this current study. This thesis explores and demonstrates the investigation of metal xanthates as potential latent thermal catalysts for curing of epoxy resins.","subitem_description_type":"Abstract"}]},"item_20_description_5":{"attribute_name":"備考","attribute_value_mlt":[{"subitem_description":"九州工業大学博士学位論文 学位記番号:生工博甲第246号 学位授与年月日:平成27年9月25日","subitem_description_type":"Other"}]},"item_20_description_60":{"attribute_name":"学位授与年度","attribute_value_mlt":[{"subitem_description":"平成27年度","subitem_description_type":"Other"}]},"item_20_dissertation_number_62":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第246号"}]},"item_20_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.18997/00004327","subitem_identifier_reg_type":"JaLC"}]},"item_20_text_34":{"attribute_name":"アドバイザー","attribute_value_mlt":[{"subitem_text_value":"パンディ, シャム スディル"}]},"item_20_version_type_63":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Chand, Vagvala Tarun","creatorNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-01-21"}],"displaytype":"detail","filename":"sei_k_246.pdf","filesize":[{"value":"3.9 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"sei_k_246.pdf","objectType":"fulltext","url":"https://kyutech.repo.nii.ac.jp/record/4333/files/sei_k_246.pdf"},"version_id":"833481c6-0278-431b-91e3-414aa6d9a692"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Metal xanthate","subitem_subject_scheme":"Other"},{"subitem_subject":"Latent catalyst","subitem_subject_scheme":"Other"},{"subitem_subject":"Epoxy resin","subitem_subject_scheme":"Other"},{"subitem_subject":"Cross-linking kinetics","subitem_subject_scheme":"Other"},{"subitem_subject":"In-situ metal sulfide","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":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"Synthesis of Metal Xanthates and Their Application as Latent Catalysts for Curing of Epoxy Resin","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Synthesis of Metal Xanthates and Their Application as Latent Catalysts for Curing of Epoxy Resin","subitem_title_language":"en"},{"subitem_title":"キサンテン金属化合物の合成と特性評価、およびエポキシ樹脂潜在性触媒への応用","subitem_title_language":"ja"}]},"item_type_id":"20","owner":"18","path":["7"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2016-01-21"},"publish_date":"2016-01-21","publish_status":"0","recid":"4333","relation_version_is_last":true,"title":["Synthesis of Metal Xanthates and Their Application as Latent Catalysts for Curing of Epoxy Resin"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2024-08-05T08:33:35.110352+00:00"}