In this study, we investigated the influence of reaction onset temperature on the formation mechanism of the cross-linked network structure of epoxy resins cured with a phenolic hardener, which is used as semiconductor encapsulants.Two types of organophosphine compounds were used as latent catalysts. The catalysts used were triphenylphosphine (TPP)and tetraphenylphosphonium tetra-p-tolylborate (TPPTTB), which react at different temperature. By evaluating changes in gel fraction and glass transition temperature (Tg) during the curing process, it was found that epoxy resin EP-TPPTTB reacted at high temperature using TPPTTB had a higher conversion at the gelation point compared to EP-TPP reacted at low temperature using TPP. Furthermore, it was found that the Tg of EP-TPPTTB was lower than that of EP-TPP during the process from gelation to full curing. This reflects differences in reactivity due to steric hindrance of the catalyst, suggesting that the catalyst influences the polymer chain growth mechanism and cross-linking mechanism.
"},{"@language":"ja","@value":"本研究では，半導体封止材として使用されるフェノール硬化型エポキシ樹脂の架橋ネットワーク構造の形成メカニズム解明のために，反応開始温度が及ぼす影響を，2 種類の有機ホスフィン化合物を潜伏性触媒として用いて解析した。触媒には異なる温度で反応する，トリフェニルホスフィン（TPP)およびテトラフェニルホスホニウムテトラ-p-トリルボレート（TPPTTB)を用いた。硬化過程におけるゲル分率およびガラス転移温度（Tg)の変化を評価した結果，TPPTTB を用いて高温で反応させたエポキシ樹脂EP-TPPTTB は，TPP を用いて低温で反応させたEP-TPP と比較して，ゲル化点における反応率が高いことが明らかとなった。また，ゲル化点から完全硬化に至る過程において，EP-TPPTTB のTg はEP-TPP よりも低くなることが明らかとなった。これは，触媒の立体障害に起因する反応性の違いを反映しており，触媒によって分子鎖の成長メカニズムおよび架橋メカニズムが異なることが示唆された。
"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410587196512397827","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Kakara Takeshi"},{"@language":"ja","@value":"加々良 剛志"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Corporate Engineering Center Sumitomo Bakelite Co., Ltd."},{"@language":"ja","@value":"住友ベークライト株式会社 コーポレートエンジニアリングセンター"},{"@language":"en","@value":"Department of Applied Chemistry Kyushu University"},{"@language":"ja","@value":"九州大学 大学院工学研究院応用化学専攻"}]},{"@id":"https://cir.nii.ac.jp/crid/1410587196512397828","@type":"Researcher","foaf:name":[{"@language":"ja","@value":"首藤 靖幸"},{"@language":"en","@value":"Shudo Yasuyuki"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Corporate Engineering Center Sumitomo Bakelite Co., Ltd."},{"@language":"ja","@value":"住友ベークライト株式会社 コーポレートエンジニアリングセンター"}]},{"@id":"https://cir.nii.ac.jp/crid/1410587196512397825","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Izumi Atsushi"},{"@language":"ja","@value":"和泉 篤士"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Corporate Engineering Center Sumitomo Bakelite Co., Ltd."},{"@language":"ja","@value":"住友ベークライト株式会社 コーポレートエンジニアリングセンター"}]},{"@id":"https://cir.nii.ac.jp/crid/1410587196512397826","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Shundo Atsuomi"},{"@language":"ja","@value":"春藤 淳臣"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"九州大学 大学院統合新領域学府 オートモーティブサイエンス専攻"},{"@language":"en","@value":"Department of Automotive Science Kyushu University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410587196512397824","@type":"Researcher","foaf:name":[{"@language":"ja","@value":"田中 敬二"},{"@language":"en","@value":"Tanaka Keiji"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Applied Chemistry Kyushu University"},{"@language":"ja","@value":"九州大学 大学院工学研究院応用化学専攻"},{"@language":"en","@value":"Department of Automotive Science Kyushu University"},{"@language":"ja","@value":"九州大学 大学院統合新領域学府 オートモーティブサイエンス専攻"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"24333786"},{"@type":"EISSN","@value":"24342149"},{"@type":"NDL_BIB_ID","@value":"028388298"},{"@type":"ISSN","@value":"24333786"},{"@type":"LISSN","@value":"24333786"},{"@type":"NCID","@value":"AA1281058X"}],"prism:publicationName":[{"@language":"ja","@value":"ネットワークポリマー論文集"},{"@language":"en","@value":"Journal of Networkpolymer,Japan"},{"@language":"ja","@value":"ネットワークポリマー"},{"@language":"en","@value":"Networkpolymer"}],"dc:publisher":[{"@language":"en","@value":"Japan Thermosetting Plastics Industry Association"},{"@language":"ja","@value":"合成樹脂工業協会"}],"prism:publicationDate":"2025-09-10","prism:volume":"46","prism:number":"5","prism:startingPage":"228","prism:endingPage":"235"},"url":[{"@id":"http://id.ndl.go.jp/bib/034356597"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I034356597"}],"availableAt":"2025-09-10","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=epoxy%20resins","dc:title":"epoxy resins"},{"@id":"https://cir.nii.ac.jp/all?q=cross-linked%20network%20structure","dc:title":"cross-linked network structure"},{"@id":"https://cir.nii.ac.jp/all?q=organophosphine%20catalysts","dc:title":"organophosphine catalysts"},{"@id":"https://cir.nii.ac.jp/all?q=latent%20catalysts","dc:title":"latent catalysts"}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2014594634"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I034356597"}]}