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Nippon Kagaku Kaishi最新文献

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Effects of Affinity with 2-Methylheptane of Melamine Resin on Cracking of Melamine-cured Coating Film. 三聚氰胺树脂与2-甲基庚烷的亲合力对三聚氰胺固化漆膜开裂的影响。
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.165
Kentaro Watanabe, T. Ishihara, Masahiko Yamanaka
{"title":"Effects of Affinity with 2-Methylheptane of Melamine Resin on Cracking of Melamine-cured Coating Film.","authors":"Kentaro Watanabe, T. Ishihara, Masahiko Yamanaka","doi":"10.1246/NIKKASHI.2002.165","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.165","url":null,"abstract":"メラミン硬化型塗膜のひび割れに及ぼすメラミン樹脂の2-メチルヘプタンに対する親和性の影響についてミネラルスピリットトレランス(MST)を用いて検討した． MSTの異なるメラミン硬化型塗膜の耐候性試験を実施した結果，MSTの高いメラミン樹脂を配合した塗膜はひび割れが発生するまでの時間が短く，ガラス転移温度，橋かけ密度，破断強度および破断伸び率の変化が大きいことがわかった．また，初期の橋かけ密度は，MSTの高いメラミン樹脂を配合した塗膜の方が著しく低くなっていることがわかった． 耐候性試験時間が120, 240, 360, 480時間の塗膜を赤外分光光度計を用いて分析した結果，アルキル基(2900 cm−1)とエステル(1730 cm−1)の吸光度比およびメラミン(1550 cm−1)とエステル(1730 cm−1)の吸光度比から，塗膜中のアルキル基およびメラミンの残存率が低下していることがわかった．また，MSTの高いメラミン樹脂を配合した塗膜の方が残存率の低下が大きいことがわかった． よって，メラミン硬化型塗膜の耐候性試験によるひび割れはメラミン樹脂のMSTに影響され，MSTの高いメラミン樹脂を配合した塗膜の方が短い時間でひび割れが発生することがわかった．MSTの高い塗膜の方が短い時間でひび割れが発生するのは，初期の橋かけ密度が低いために塗膜への水分の透過が多くなり，塗膜の加水分解が生じやすくなり，著しい塗膜物性の低下が生じるためであると推定できる．","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"52 1","pages":"165-168"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81103606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis of Aromatic Polyester Having Oligosaccharide in the Main Chain. 主链低聚糖芳香族聚酯的合成。
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.53
K. Hatanaka, R. Shiraishi, K. Katsuraya, K. Okuyama
{"title":"Synthesis of Aromatic Polyester Having Oligosaccharide in the Main Chain.","authors":"K. Hatanaka, R. Shiraishi, K. Katsuraya, K. Okuyama","doi":"10.1246/NIKKASHI.2002.53","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.53","url":null,"abstract":"D-ラクトースのC-6位とC-6′位にある第一級ヒドロキシ基を選択的にトリチル基で保護し，第二級ヒドロキシ基を有する他の位置にはアセチル基を導入した．脱トリチル化の反応では，アシル転移が起こり，C-6位とC-4′位にフリーの水酸基を有するアセチル化ラクトースを合成した．得られた1,2,3,2′,3′,6′-ヘキサ-O-アセチル-D-ラクトースと二塩化テレフタロイルを反応させることにより，オリゴ糖鎖を有するポリエステルを合成した．","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"29 1","pages":"53-55"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73528827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Antioxidative Effect of Taheebo Extract. 茯苓提取物的抗氧化作用。
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.481
H. Shimofuruya, Asami Fujii, I. Suzuki, Yoshihiko Kunieda
{"title":"Antioxidative Effect of Taheebo Extract.","authors":"H. Shimofuruya, Asami Fujii, I. Suzuki, Yoshihiko Kunieda","doi":"10.1246/NIKKASHI.2002.481","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.481","url":null,"abstract":"Antioxidative effects of Taheebo extract, obtained from the bulk of Tabebuia avellanedae Lorents and Griseb, were examined by two assay methods for radical scavenging activity on DPPH and inhibitory effect on linoleic acid peroxidation. In the case of the DPPH method, Taheebo showed the electron donating ability to DPPH and its ability corresponded to that of trolox in the present experimantal condition. On the other hand, in the autoxidation of liloleic acid, Taheebo extract showed the most inhibitory effect in teas tested (green tea and oolong tea.). These results suggested that Taheebo extract was a desirable antioxidant.","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"3 1","pages":"481-483"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75790651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Characterization of Electrode Materials during Degradation Process of Li-ion Batteries. 锂离子电池降解过程中电极材料的表征
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.189
Noboru Sato, Koichi Hirao, Eiji Hayashi, Gen Katagiri
{"title":"Characterization of Electrode Materials during Degradation Process of Li-ion Batteries.","authors":"Noboru Sato, Koichi Hirao, Eiji Hayashi, Gen Katagiri","doi":"10.1246/NIKKASHI.2002.189","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.189","url":null,"abstract":"正極にLiMn2O4を，負極にグラファイトを用いたリチウムイオン電池は，エネルギー密度と出力密度が大きい点で自動車用駆動源として期待されている．しかし，自動車用途では低温から高温までの広い範囲で電池が使用されるため，特に高温領域におけるサイクル劣化が問題になる．45 °Cの温度条件下でサイクル劣化を起こしたリチウムイオン電池に対して，正負極の劣化状態について解析した． 正極の構造変化についてESRとNMRを用いて解析したところ，スピネル型LiMn2O4は，ヤーン · テラー効果により正方晶Li2Mn2O4に変化したことが確認された．スピネル型LiMn2O4に比べて正方晶Li2Mn2O4ではリチウムの拡散が遅くなることから，この結晶の転移が容量低下と内部抵抗の上昇の一因となっているものと考えられた． また負極表面では，サイクル劣化により新たな皮膜が形成されていることがXPS測定により確認できた．この皮膜には電解質であるLiPF6の分解成分が含まれていたために，皮膜が厚くなることが電池の内部抵抗上昇の一因になっているものと考察された．","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"8 1","pages":"189-194"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73137796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Effects of Various Ions on the Synthesis of Strontium Phosphates Obtained by Homogeneous Precipitation Method. 不同离子对均匀沉淀法合成磷酸锶的影响。
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.321
Chiharu Kato, K. Fujita, Keizo Matsuda
{"title":"Effects of Various Ions on the Synthesis of Strontium Phosphates Obtained by Homogeneous Precipitation Method.","authors":"Chiharu Kato, K. Fujita, Keizo Matsuda","doi":"10.1246/NIKKASHI.2002.321","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.321","url":null,"abstract":"尿素の加水分解を利用した均一沈殿法によるストロンチウムの各種リン酸塩の合成における反応条件について詳しく調べた．その結果，反応溶液のpH変化や加熱時間のほかに，Sr2+イオン濃度やCl−イオン濃度も各種リン酸塩の生成過程やSr–Ap(ストロンチウムアパタイト)の組成に影響を及ぼした．均一沈殿法によるSr–Apの合成では，初期生成物としてα-SrHPO4が生成し，(i)α-SrHPO4からSr3(PO4)2を経てSr–Apになる場合と，(ii)α-SrHPO4からβ-SrHPO4を経てSr–Apになる場合の二系統の生成過程がある．初期生成物であるα-SrHPO4はpH 6.2付近では，反応溶液のSr2+イオン濃度が低いとSr3(PO4)2に，Sr2+イオン濃度が高いとβ-SrHPO4に変化し，pH 7.2付近では反応溶液のSr2+イオン濃度にかかわらずβ-SrHPO4に変化した．中間生成物であるSr3(PO4)2やβ-SrHPO4は反応溶液のSr2+イオン濃度やCl−イオン濃度が高いほど短時間でSr–Apに変化した．","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"18 1","pages":"321-328"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73853793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Alkylation of Diphenyl Oxide with Long Chain Olefins Using Smectite Clay Catalysts. 蒙脱石粘土催化氧化二苯与长链烯烃的烷基化反应。
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.37
Hitoshi Asakura, H. Tomioka
{"title":"Alkylation of Diphenyl Oxide with Long Chain Olefins Using Smectite Clay Catalysts.","authors":"Hitoshi Asakura, H. Tomioka","doi":"10.1246/NIKKASHI.2002.37","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.37","url":null,"abstract":"各種スメクタイト粘土触媒を長鎖オレフィンによるジフェニルオキシドの液相アルキル化反応に用い，触媒物性(細孔等)と反応生成物の関係を考察した．酸処理により生成するメソ細孔を持つものはかさ高い基質の反応に高い活性を示し，AlCl3に代替しうる．一方，カードハウス構造を持つサポナイトはY-型ゼオライトと似た反応組成を与えた．また，シート構造を持つモンモリロナイトは，高温処理ではシート収縮により活性を失うが，120 °C程度の乾燥条件下では酸処理品に準じた活性を示した．生成物のかさ高さと細孔径との間には相関が認められ，大きいものほどポリアルキル体，およびo-体の比率が高くなった．側鎖アルキル異性体分布はp-体においては広くなるが，これは置換基の立体障害と一部オレフィンの異性化のためと考えられる．一次元細孔を持つモルデナイトは，直線形状を持つ生成物に対して選択性を示した．粘土系触媒は生成物組成の面からミクロ細孔系触媒と均一系触媒の中間に位置づけられた．","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"8 1","pages":"37-46"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88661778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Photochemical Reaction of Azoxybenzenes in the Presence of Acetic Acid. 偶氮氧苯在乙酸存在下的光化学反应。
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.339
J. Yamamoto, Ryuji Hamada, T. Tsuboi
{"title":"Photochemical Reaction of Azoxybenzenes in the Presence of Acetic Acid.","authors":"J. Yamamoto, Ryuji Hamada, T. Tsuboi","doi":"10.1246/NIKKASHI.2002.339","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.339","url":null,"abstract":"","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"116 1","pages":"339-343"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86033205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Syntheses of Novel Net-worked Hybrid Copolymers with Alternative Tantalum-Organic Moieties. 新型钽-有机基团网状杂化共聚物的合成。
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.371
Ryoichi Kudo, H. Matsui, M. Yoshihara
{"title":"Syntheses of Novel Net-worked Hybrid Copolymers with Alternative Tantalum-Organic Moieties.","authors":"Ryoichi Kudo, H. Matsui, M. Yoshihara","doi":"10.1246/NIKKASHI.2002.371","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.371","url":null,"abstract":"タンタルブトキシドと種々の有機ジオールとの反応を行ったところ，タンタル-有機基交互構造を有する新規ハイブリッド共重合体が生成した．また，生成物の形状は，導入する有機基の種類によって形状が変化することが判明した．さらに，生成物の電子物性を検討するためにESRスペクトルおよびab-initio分子軌道計算を行ったところ，共役系有機基を導入した系において，交互構造内で有機骨格よりタンタル原子上へ電子移動が生じていることが判明した．","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"22 1","pages":"371-375"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87241619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
The Oxygen Transfer Reaction of 4-Acetylazoxybenzenes in Sulfuric Acid. 4-乙酰氮氧苯在硫酸中的氧转移反应。
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.463
J. Yamamoto, K. Hamanaka, T. Tsuboi
{"title":"The Oxygen Transfer Reaction of 4-Acetylazoxybenzenes in Sulfuric Acid.","authors":"J. Yamamoto, K. Hamanaka, T. Tsuboi","doi":"10.1246/NIKKASHI.2002.463","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.463","url":null,"abstract":"When the starting materials 4-acetyl-ONN- and -NNO-azoxybenzene(1α and 1β, respectively) were heated in 70/80% sulfuric acid, α/β isomerization and the Wallach rearrangement to 4-acetyl-4′-hydroxyazobenzene (2) were observed. However, neither the o-hydroxyazobenzene nor 4-acetyl azobenzene was detected in the reaction product. The isomerization of 1α was faster than that of 1β, demonstrating the higher themodynamic stability of the latter.","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"37 1","pages":"463-466"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87437290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
アパタイト型Ndx(SiO4)6O1.5x−12単結晶のEPMAによって決定された組成と伝導率の関係 磷灰石型Ndx(SiO4) 6o1.5 x - 12单结晶EPMA确定的组分和电导率的关系
Nippon Kagaku Kaishi Pub Date : 2002-01-01 DOI: 10.1246/NIKKASHI.2002.243
享 中山, 幹雄 樋口, 和義 上松
{"title":"アパタイト型Ndx(SiO4)6O1.5x−12単結晶のEPMAによって決定された組成と伝導率の関係","authors":"享 中山, 幹雄 樋口, 和義 上松","doi":"10.1246/NIKKASHI.2002.243","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.243","url":null,"abstract":"Four kinds of single crystals of hexagonal apatite type Ndx(SiO4)6O1.5x−12 (x = 8–9.33), which is an oxide ionic conductor, were prepared by the FZ method and samples for electrical measurements (the conductivity components parallel and perpendicular to the c-axis of single crystal) were prepared. The conductivities of the component parallel to the c-axis were higher about one order of magnitude, compared with those of the component perpendicular. The values of (Nd/Si) × 6 of four kinds of samples were 8.63, 8.67, 8.91 and 9.33 determined by electron probe micro-analysis. The conductivity was slightly increased with decreasing the value of (Nd/Si) × 6.","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"20 1","pages":"243-245"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82554760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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