Chain Alignment of a Rigid Ring Polymer in the Lyotropic Liquid Crystal Phase: Cyclic Amylose Tris(n-butylcarbamate) in Tetrahydrofuran and Ethyl Lactate

Kabata, Daigo; Ryoki, Akiyuki; Kitamura, Shinichi; Terao, Ken

doi:https://doi.org/10.1021/acs.macromol.1c01783

Chain Alignment of a Rigid Ring Polymer in the Lyotropic Liquid Crystal Phase: Cyclic Amylose Tris(n-butylcarbamate) in Tetrahydrofuran and Ethyl Lactate

Kabata, Daigo; Ryoki, Akiyuki; Kitamura, Shinichi et al.

Macromolecules, 2021, 54(23), 10723-10729

アクセス数:175件（2025-07-15 05:10 集計）

固定URL: https://hdl.handle.net/11094/97153

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タイトル	Chain Alignment of a Rigid Ring Polymer in the Lyotropic Liquid Crystal Phase: Cyclic Amylose Tris(n-butylcarbamate) in Tetrahydrofuran and Ethyl Lactate
著者	著者名 Kabata, Daigo
	NRID 1000070847102 1000070847102 著者名 Ryoki, Akiyuki
	NRID 1000060117869 1000060117869 著者名 Kitamura, Shinichi
	NRID 1000060334132 1000060334132 ORCID 0000-0001-7363-4491 0000-0001-7363-4491 researchmap permalink kenterao kenterao Scopus Author ID 7101653015 7101653015 著者名 Terao, Ken
内容	Kabata D., Ryoki A., Kitamura S., et al. Chain Alignment of a Rigid Ring Polymer in the Lyotropic Liquid Crystal Phase: Cyclic Amylose Tris(n-butylcarbamate) in Tetrahydrofuran and Ethyl Lactate. Macromolecules 54, 10723 (2021); https://doi.org/10.1021/acs.macromol.1c01783.
抄録	Concentrated solutions of a rigid ring polymer, cyclic amylose tris(n-butylcarbamate) (cATBC), have lyotropic liquid crystallinity. Phase boundary concentrations of cATBC in tetrahydrofuran (THF) and l-ethyl lactate (EL) were almost identical to those for the linear polymer (ATBC) with the same molar mass. X-ray diffraction for the concentrated cATBC solutions revealed that nematic phases were found for cATBC in the two solvents, while the cholesteric structure was observed for the cATBC-EL system. Several peaks were found in the high q range between 3 and 10 nm-1 with q being the magnitude of the scattering vector. The obtained patterns were almost the same as that for an ATBC sample in the corresponding solvent, indicating that the local alignment of the polymer chains is similar between the ring and linear polymers. This result strongly suggests that cATBC chains in concentrated solutions form a pseudo-rodlike conformation with two kinks, whereas cATBC chains behave as semirigid rings in dilute solution. The phase diagram can be also explained in terms of the known theory for the wormlike cylinder, assuming the pseudo-rodlike conformation.
出版者	American Chemical Society
収録物名	Macromolecules
巻(号)	54(23)
ページ	10723-10729
刊行年月	2021-12-14
言語	英語
ハンドルURL	https://hdl.handle.net/11094/97153
PISSN	00249297
eISSN	15205835
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1021/acs.macromol.1c01783
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	Macromolecules. 2021, 54(23), p. 10723-10729
DC.title	Chain Alignment of a Rigid Ring Polymer in the Lyotropic Liquid Crystal Phase: Cyclic Amylose Tris(n-butylcarbamate) in Tetrahydrofuran and Ethyl Lactate
DC.creator	Kabata, Daigo
	Ryoki, Akiyuki
	Kitamura, Shinichi
	Terao, Ken
DC.publisher	American Chemical Society
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2021-12-14
DC.identifier	https://doi.org/10.1021/acs.macromol.1c01783
DC.description	Kabata D., Ryoki A., Kitamura S., et al. Chain Alignment of a Rigid Ring Polymer in the Lyotropic Liquid Crystal Phase: Cyclic Amylose Tris(n-butylcarbamate) in Tetrahydrofuran and Ethyl Lactate. Macromolecules 54, 10723 (2021); https://doi.org/10.1021/acs.macromol.1c01783.
DCTERMS.abstract	Concentrated solutions of a rigid ring polymer, cyclic amylose tris(n-butylcarbamate) (cATBC), have lyotropic liquid crystallinity. Phase boundary concentrations of cATBC in tetrahydrofuran (THF) and l-ethyl lactate (EL) were almost identical to those for the linear polymer (ATBC) with the same molar mass. X-ray diffraction for the concentrated cATBC solutions revealed that nematic phases were found for cATBC in the two solvents, while the cholesteric structure was observed for the cATBC-EL system. Several peaks were found in the high q range between 3 and 10 nm-1 with q being the magnitude of the scattering vector. The obtained patterns were almost the same as that for an ATBC sample in the corresponding solvent, indicating that the local alignment of the polymer chains is similar between the ring and linear polymers. This result strongly suggests that cATBC chains in concentrated solutions form a pseudo-rodlike conformation with two kinks, whereas cATBC chains behave as semirigid rings in dilute solution. The phase diagram can be also explained in terms of the known theory for the wormlike cylinder, assuming the pseudo-rodlike conformation.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	97153
citation_title	Chain Alignment of a Rigid Ring Polymer in the Lyotropic Liquid Crystal Phase: Cyclic Amylose Tris(n-butylcarbamate) in Tetrahydrofuran and Ethyl Lactate
citation_author	Kabata, Daigo
	Ryoki, Akiyuki
	Kitamura, Shinichi
	Terao, Ken
citation_publisher	American Chemical Society
citation_language	英語
citation_date	2021-12-14
citation_journal_title	Macromolecules
citation_volume	54
citation_issue	23
citation_firstpage	10723
citation_lastpage	10729
citation_doi	https://doi.org/10.1021/acs.macromol.1c01783
citation_public_url	https://hdl.handle.net/11094/97153

Chain Alignment of a Rigid Ring Polymer in the Lyotropic Liquid Crystal Phase: Cyclic Amylose Tris(n-butylcarbamate) in Tetrahydrofuran and Ethyl Lactate

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