{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282681499832448.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1295/koron.38.821"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"2432457"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/2432457"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I2432457"}},{"identifier":{"@type":"NAID","@value":"130003836748"}}],"dc:title":[{"@value":"キトサン存在下でのメタクリル酸のリビングラジカル重合"},{"@language":"en","@value":"Living Radical Polymerization of Methacrylic acid in the Presence of Chitosan"},{"@language":"ja-Kana","@value":"キトサン ソンザイカ デ ノ メタクリルサン ノ リビング ラジカル ジュウゴ"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"The polymerization of sodium methacrylate (MAA·Na) was kinetically investigated in aqueous solution in the presence of chitosan acetate salt (CS·AcOH) using potassium persulfate (KPS) as an initiator. The polymerization rate (Rp) in the presence of CS·AcOH equimolor to MAA·Na, was expressed as follows.<BR>R<SUB>p</SUB>=k [KPS]<SUP>0</SUP> [MAA·Na]<SUP>0.8</SUP> for [KPS] <3.5×10<SUP>-3</SUP>mol/<I>l</I><BR>R<SUB>p</SUB>=k [KPS]<SUP>1.8</SUP> [MAA·Na]<SUP>0.8</SUP> for [KPS] >3.5×10<SUP>-3</SUP>mol/<I>l</I><BR>Molecular weight of poly (methacrylic acid) (PMAA) obtained at polymerization temperature below 60°C with the initiator of low concentration increased linearly with increasing the conversion. The polymerization proceeded with rapid initiation, succesive propagation and no termination. These results as well as analysis on the end group of PMAA indicated that an initiation occurred at reducing end-groups of chitosan, and that the propagation reaction proceeded among MAA molecules bound on chitosan molecule by the ionic and hydrophobic binding."},{"@value":"キトサン (CS) の存在下でのメタクリル酸 (MAA) のラジカル重合について, 重合速度 (R<SUB>p</SUB>) および生成ポリ (メウクリル酸) (PMAA) の分子量を追究した. 重合は, MAAナトリウム塩 (MAA・Na) の水溶液にCS酢酸塩 (CS・AcOH) を加え, 過硫酸カリウム (KPS) を開始剤に用いて行った. 重合率はPMAAの生成量から求めた. CS・AcOH/MAA・Naのモル比が1.0の場合, 30℃でMAA・Naの重合速度は次の関係によって表される.<BR>[KPS] <3.5×10<SUP>-3</SUP>mol/<I>l</I><BR><I>R</I><SUB>p</SUB>=<I>k</I> [KPS]<SUP>0</SUP> [MAA・Na]<SUP>0.3</SUP><BR>[KPS] >3.5×10<SUP>-3</SUP>mol/<I>l</I><BR><I>R</I><SUB>p</SUB>=<I>k</I> [KPS]<SUP>1.3</SUP> [MAA・Na]<SUP>0.8</SUP><BR>生成したPMAAの分子量は低開始剤濃度, 60℃以下では重合率の増加とともに増大し, 停止反応を伴わない迅速開始, 逐次重合反応の様子を示した. これらの結果, およびポリマー末端の分析から, マトリックスとして用いたCSの還元性末端側から開始反応が起こっていると推定した."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410282681499832448","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000254396990"}],"foaf:name":[{"@language":"en","@value":"KATAOKA Seiichi"},{"@language":"ja","@value":"片岡 清一"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Government Industrial Research Institute"},{"@language":"ja","@value":"工業技術院大阪工業技術試験所"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282681499832449","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000254396991"}],"foaf:name":[{"@language":"en","@value":"ANDO Tadanao"},{"@language":"ja","@value":"安東 忠直"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Government Industrial Research Institute"},{"@language":"ja","@value":"工業技術院大阪工業技術試験所"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03862186"},{"@type":"LISSN","@value":"03862186"},{"@type":"EISSN","@value":"18815685"},{"@type":"CODEN","@value":"KBRBA"},{"@type":"NDL_BIB_ID","@value":"000000025923"},{"@type":"ISSN","@value":"03862186"},{"@type":"NCID","@value":"AN00085011"}],"prism:publicationName":[{"@language":"en","@value":"KOBUNSHI RONBUNSHU"},{"@language":"ja","@value":"高分子論文集"},{"@language":"en","@value":"KOBUNSHI RONBUNSHU"},{"@language":"ja","@value":"高分子論文集"}],"dc:publisher":[{"@language":"en","@value":"The Society of Polymer Science, Japan"},{"@language":"ja","@value":"公益社団法人 高分子学会"}],"prism:publicationDate":"1981","prism:volume":"38","prism:number":"12","prism:startingPage":"821","prism:endingPage":"827"},"reviewed":"false","url":[{"@id":"http://id.ndl.go.jp/bib/2432457"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I2432457"}],"availableAt":"1981","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Living%20Radical%20Polymerization","dc:title":"Living Radical Polymerization"},{"@id":"https://cir.nii.ac.jp/all?q=Matrix%20Polymerization","dc:title":"Matrix Polymerization"},{"@id":"https://cir.nii.ac.jp/all?q=Chitosan","dc:title":"Chitosan"},{"@id":"https://cir.nii.ac.jp/all?q=Poly%20(methacrylic%20acid)","dc:title":"Poly (methacrylic acid)"}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0019098714"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I2432457"},{"@type":"CROSSREF","@value":"10.1295/koron.38.821"},{"@type":"CIA","@value":"130003836748"}]}