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タイトル: | Molecular weight between entanglements for κ- and ι-carrageenans in an ionic liquid. |
著者: | Horinaka, Jun-Ichi Urabayashi, Yuhei Wang, Xiaochen Takigawa, Toshikazu |
著者名の別形: | 堀中, 順一 |
キーワード: | Molecular weight between entanglements Carrageenan Ionic liquid |
発行日: | 6-Jun-2014 |
出版者: | Elsevier B.V. |
誌名: | International journal of biological macromolecules |
巻: | 69C |
開始ページ: | 416 |
終了ページ: | 419 |
抄録: | The molecular weight between entanglements (Me) for κ- and ι-carrageenans, sulfated galactans, was examined in concentrated solutions using an ionic liquid 1-butyl-3-methylimidazolium acetate as a solvent. The dynamic viscoelasticity data for the solutions measured at different temperatures were overlapped according to the time-temperature superposition principle, and the obtained master curves exhibited the flow and rubbery plateau zones, being typical of concentrated polymer solutions having entanglement coupling. The values of Me for κ- and ι-carrageenans in the solutions were determined from the plateau moduli. Then the values of Me in the molten state (Me, melt) estimated as a material constant to be 6.6×10(3) and 7.2×10(3), respectively. The close values of Me, melt for κ- and ι-carrageenans indicate that 4-sulfate group of ι-carrageenan are not so influential for the entanglement network. Compared with agarose, a non-sulfate galactan, carrageenans have larger values of average spacing between entanglements. |
著作権等: | © 2014 Elsevier B.V. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/188891 |
DOI(出版社版): | 10.1016/j.ijbiomac.2014.05.076 |
PubMed ID: | 24909313 |
出現コレクション: | 学術雑誌掲載論文等 |
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