Synthesis and Liquid Crystalline Properties of New Thermotropic Polyurethanes

Emo Chiellini; Giancarlo Galli; Stefano Trusendi; Sante A. Angeloni; Michele Laus; Oriano Francescangeli

doi:10.1080/10587259408037766

Synthesis and Liquid Crystalline Properties of New Thermotropic Polyurethanes

Emo Chiellini, Giancarlo Galli, Stefano Trusendi, Sante A. Angeloni, Michele Laus, Oriano Francescangeli

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

Abstract

The synthesis and liquid crystal behavior of new thermotropic polyurethanes derived from different mesogenic diols, alkylene di[4-(w-hydroxyalkyloxy-4-oxybenzoyI)oxybenzoate]s, and 2,4-toluenediiso cyanate are reported. Depending upon the chemical structure of the repeat unit, the polyurethanes formed either one or two mesophases extending over a fairly broad (>60 K) and accessible range of temperature (T< 430 K). A cybotactic nematic mesophase was identified in each polyurethane sample.

Lingua originale	Inglese
pagine (da-a)	135-147
Numero di pagine	13
Rivista	Molecular Crystals and Liquid Crystals
Volume	243
Numero di pubblicazione	1
DOI	https://doi.org/10.1080/10587259408037766
Stato di pubblicazione	Pubblicato - 1 mar 1994
Pubblicato esternamente	Sì

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title = "Synthesis and Liquid Crystalline Properties of New Thermotropic Polyurethanes",

abstract = "The synthesis and liquid crystal behavior of new thermotropic polyurethanes derived from different mesogenic diols, alkylene di[4-(w-hydroxyalkyloxy-4-oxybenzoyI)oxybenzoate]s, and 2,4-toluenediiso cyanate are reported. Depending upon the chemical structure of the repeat unit, the polyurethanes formed either one or two mesophases extending over a fairly broad (>60 K) and accessible range of temperature (T< 430 K). A cybotactic nematic mesophase was identified in each polyurethane sample.",

keywords = ": liquid crystal polymer, cybotactic nematic, nematic mesophase, thermotropic polyurethane",

author = "Emo Chiellini and Giancarlo Galli and Stefano Trusendi and Angeloni, {Sante A.} and Michele Laus and Oriano Francescangeli",

note = "Funding Information: Work done with partial financial support from the Italian Ministry of University and Scientific Research (MURST-40%) and the National Research Council (CNR-Chimica Fine 11).",

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AU - Chiellini, Emo

AU - Galli, Giancarlo

AU - Trusendi, Stefano

AU - Angeloni, Sante A.

AU - Laus, Michele

AU - Francescangeli, Oriano

N1 - Funding Information: Work done with partial financial support from the Italian Ministry of University and Scientific Research (MURST-40%) and the National Research Council (CNR-Chimica Fine 11).

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N2 - The synthesis and liquid crystal behavior of new thermotropic polyurethanes derived from different mesogenic diols, alkylene di[4-(w-hydroxyalkyloxy-4-oxybenzoyI)oxybenzoate]s, and 2,4-toluenediiso cyanate are reported. Depending upon the chemical structure of the repeat unit, the polyurethanes formed either one or two mesophases extending over a fairly broad (>60 K) and accessible range of temperature (T< 430 K). A cybotactic nematic mesophase was identified in each polyurethane sample.

AB - The synthesis and liquid crystal behavior of new thermotropic polyurethanes derived from different mesogenic diols, alkylene di[4-(w-hydroxyalkyloxy-4-oxybenzoyI)oxybenzoate]s, and 2,4-toluenediiso cyanate are reported. Depending upon the chemical structure of the repeat unit, the polyurethanes formed either one or two mesophases extending over a fairly broad (>60 K) and accessible range of temperature (T< 430 K). A cybotactic nematic mesophase was identified in each polyurethane sample.

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KW - thermotropic polyurethane

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Synthesis and Liquid Crystalline Properties of New Thermotropic Polyurethanes

Abstract

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