Structural effects on the mesomorphic behaviour of thermotropic liquid crystal poly(ester β-sulphide)s

Giancarlo Galli; Emo Chiellini; Michele Laus; Annino S. Angeloni

doi:10.1016/0014-3057(91)90099-A

Structural effects on the mesomorphic behaviour of thermotropic liquid crystal poly(ester β-sulphide)s

Giancarlo Galli, Emo Chiellini, Michele Laus, Annino S. Angeloni

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

Three new classes of thermotropic liquid-crystalline poly(ester β-sulphide)s C7Sn, C8Sn and C10Sn were prepared, based on alkylene spaced (m = 7, 8 or 10) p-oxybenzoyl diads interconnected by bis-sulphide containing spacer segments (n = 2-6). A nematic mesophase is exhibited in each case, with stability and persistence depending on the length and parity of both flexible segments. The nematicisotropic transition parameters are discussed with reference also to those of previously investigated poly(ester β-sulphide)s C5Sn and C9Sn to elucidate the effects of structural variations on the thermotropic properties of the polymers. The sequence aromatic-aliphatic-aromatic in poly(ester β-sulphide)s CmSn should be regarded as the actual mesogenic core regularly interspersed by sulphide-containing flexible segments.

Lingua originale	Inglese
pagine (da-a)	237-241
Numero di pagine	5
Rivista	European Polymer Journal
Volume	27
Numero di pubblicazione	3
DOI	https://doi.org/10.1016/0014-3057(91)90099-A
Stato di pubblicazione	Pubblicato - 1991
Pubblicato esternamente	Sì

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title = "Structural effects on the mesomorphic behaviour of thermotropic liquid crystal poly(ester β-sulphide)s",

abstract = "Three new classes of thermotropic liquid-crystalline poly(ester β-sulphide)s C7Sn, C8Sn and C10Sn were prepared, based on alkylene spaced (m = 7, 8 or 10) p-oxybenzoyl diads interconnected by bis-sulphide containing spacer segments (n = 2-6). A nematic mesophase is exhibited in each case, with stability and persistence depending on the length and parity of both flexible segments. The nematicisotropic transition parameters are discussed with reference also to those of previously investigated poly(ester β-sulphide)s C5Sn and C9Sn to elucidate the effects of structural variations on the thermotropic properties of the polymers. The sequence aromatic-aliphatic-aromatic in poly(ester β-sulphide)s CmSn should be regarded as the actual mesogenic core regularly interspersed by sulphide-containing flexible segments.",

author = "Giancarlo Galli and Emo Chiellini and Michele Laus and Angeloni, {Annino S.}",

note = "Funding Information: Acknowledgements--The authors thank the Ministero dell'Universitd e Ricerca Scientifica of Italy for financial support of the work.",

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doi = "10.1016/0014-3057(91)90099-A",

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T1 - Structural effects on the mesomorphic behaviour of thermotropic liquid crystal poly(ester β-sulphide)s

AU - Galli, Giancarlo

AU - Chiellini, Emo

AU - Laus, Michele

AU - Angeloni, Annino S.

N1 - Funding Information: Acknowledgements--The authors thank the Ministero dell'Universitd e Ricerca Scientifica of Italy for financial support of the work.

PY - 1991

Y1 - 1991

N2 - Three new classes of thermotropic liquid-crystalline poly(ester β-sulphide)s C7Sn, C8Sn and C10Sn were prepared, based on alkylene spaced (m = 7, 8 or 10) p-oxybenzoyl diads interconnected by bis-sulphide containing spacer segments (n = 2-6). A nematic mesophase is exhibited in each case, with stability and persistence depending on the length and parity of both flexible segments. The nematicisotropic transition parameters are discussed with reference also to those of previously investigated poly(ester β-sulphide)s C5Sn and C9Sn to elucidate the effects of structural variations on the thermotropic properties of the polymers. The sequence aromatic-aliphatic-aromatic in poly(ester β-sulphide)s CmSn should be regarded as the actual mesogenic core regularly interspersed by sulphide-containing flexible segments.

AB - Three new classes of thermotropic liquid-crystalline poly(ester β-sulphide)s C7Sn, C8Sn and C10Sn were prepared, based on alkylene spaced (m = 7, 8 or 10) p-oxybenzoyl diads interconnected by bis-sulphide containing spacer segments (n = 2-6). A nematic mesophase is exhibited in each case, with stability and persistence depending on the length and parity of both flexible segments. The nematicisotropic transition parameters are discussed with reference also to those of previously investigated poly(ester β-sulphide)s C5Sn and C9Sn to elucidate the effects of structural variations on the thermotropic properties of the polymers. The sequence aromatic-aliphatic-aromatic in poly(ester β-sulphide)s CmSn should be regarded as the actual mesogenic core regularly interspersed by sulphide-containing flexible segments.

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U2 - 10.1016/0014-3057(91)90099-A

DO - 10.1016/0014-3057(91)90099-A

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EP - 241

JO - European Polymer Journal

JF - European Polymer Journal

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ER -

Structural effects on the mesomorphic behaviour of thermotropic liquid crystal poly(ester β-sulphide)s

Abstract

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