Polymacromonomer Consisting of Polystyrene : Light Scattering Characterization in Cyclohexane

Takeo, Yoshishige; Tazaki, Masataka; Nakamura, Yo; Terao, Ken; Norisuye, Takashi

doi:https://doi.org/10.1295/polymj.31.193

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タイトル	Polymacromonomer Consisting of Polystyrene : Light Scattering Characterization in Cyclohexane
著者	著者名 Takeo, Yoshishige
	著者名 Tazaki, Masataka
	NRID 1000090243162 1000090243162 著者名 Nakamura, Yo
	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
	NRID 1000010028227 1000010028227 著者名 Norisuye, Takashi
キーワード等	Polymacromonomer
	Branched Polymer
	Θ Point
	Wormlike Chain
	Chain Stiffness
	Excluded-Volume Effect
抄録	Nine samples of a polymacromonomer consisting of polystyrene with a fixed side-chain length of 33 styrene residues and ranging in total weight-average molecular weight M_w from 1.9 × 10^5 to 1.1 × 10^7 have been prepared and studied by light scattering in cyclohexane at temperatures between 25 and 45°C. The second virial coefficient is found to vanish at 34.5 (±2)°C, the Θ temperature for linear polystyrene in cyclohexane. The M_w dependence of z-average mean-square radius of gyration 〈S^2〉_z at this temperature is analyzed on the basis of the wormlike chain to obtain 22 nm for Kuhn's statistical segment length λ^<-1> and 13000 nm^<-1> for the molar mass per unit contour length. The chain stiffness as indicated by this λ^<-1> value is one order of magnitude higher than that of linear polystyrene. Analysis of 〈S^2〉_z at temperatures other than the Θ point is also made with the aid of the quasi-two-parameter theory for excluded-volume effects. It is found that λ^<-1> increases gradually with raising temperature or increasing excluded-volume strength.
出版者	Nature Publishing Group
収録物名	Polymer Journal
巻(号)	31(2)
ページ	193-198
刊行年月	1999-02
言語	英語
ハンドルURL	https://hdl.handle.net/11094/25929
PISSN	00323896
NCID	AA00777013
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1295/polymj.31.193
アクセス権	open access
出版タイプ	Accepted Manuscript
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
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Polymer Journal.31(2) p.193-p.198
DC.title	Polymacromonomer Consisting of Polystyrene : Light Scattering Characterization in Cyclohexane
DC.creator	Takeo, Yoshishige
	Tazaki, Masataka
	Nakamura, Yo
	Terao, Ken
	Norisuye, Takashi
DC.publisher	Nature Publishing Group
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	1999-02
DC.identifier	https://doi.org/10.1295/polymj.31.193
DC.subject	Polymacromonomer
	Branched Polymer
	Θ Point
	Wormlike Chain
	Chain Stiffness
	Excluded-Volume Effect
DCTERMS.abstract	Nine samples of a polymacromonomer consisting of polystyrene with a fixed side-chain length of 33 styrene residues and ranging in total weight-average molecular weight M_w from 1.9 × 10^5 to 1.1 × 10^7 have been prepared and studied by light scattering in cyclohexane at temperatures between 25 and 45°C. The second virial coefficient is found to vanish at 34.5 (±2)°C, the Θ temperature for linear polystyrene in cyclohexane. The M_w dependence of z-average mean-square radius of gyration 〈S^2〉_z at this temperature is analyzed on the basis of the wormlike chain to obtain 22 nm for Kuhn's statistical segment length λ^<-1> and 13000 nm^<-1> for the molar mass per unit contour length. The chain stiffness as indicated by this λ^<-1> value is one order of magnitude higher than that of linear polystyrene. Analysis of 〈S^2〉_z at temperatures other than the Θ point is also made with the aid of the quasi-two-parameter theory for excluded-volume effects. It is found that λ^<-1> increases gradually with raising temperature or increasing excluded-volume strength.
DC.format	application/pdf
citation_title	Polymacromonomer Consisting of Polystyrene : Light Scattering Characterization in Cyclohexane
citation_author	Takeo, Yoshishige
	Tazaki, Masataka
	Nakamura, Yo
	Terao, Ken
	Norisuye, Takashi
citation_publisher	Nature Publishing Group
citation_language	英語
citation_date	1999-02
citation_journal_title	Polymer Journal
citation_volume	31
citation_issue	2
citation_firstpage	193
citation_lastpage	198
citation_doi	https://doi.org/10.1295/polymj.31.193
citation_public_url	https://hdl.handle.net/11094/25929

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