Thermal Investigation of the Nematic-Isotropic Biphase in a Thermotropic Main-Chain Polyester

M. Laus; D. Caretti; A. S. Angeloni; G. Galli; E. Chiellini

doi:10.1021/ma00007a004

Thermal Investigation of the Nematic-Isotropic Biphase in a Thermotropic Main-Chain Polyester

M. Laus
, D. Caretti
, A. S. Angeloni
, G. Galli
, E. Chiellini

Research output: Contribution to journal › Article › peer-review

Abstract

The triphasic behavior at the nematic-isotropic transition for a thermotropic main-chain polyester was studied by differential scanning calorimetry and optical microscopy. The demising and thermal evolutions of the macroscopically segregated nematic and isotropic components were monitored upon annealing at different temperatures inside the biphasic gap. The equilibrium distribution of the various molecular species at the nematic-isotropic transition and the thermodynamic biphase range were determined. The observed phase segregation is attributed to chain length heterogeneity of the sample, with the longer chain macromolecules tending to selectively segregate into the nematic phase.

Original language	English
Pages (from-to)	1459-1463
Number of pages	5
Journal	Macromolecules
Volume	24
Issue number	7
DOIs	https://doi.org/10.1021/ma00007a004
Publication status	Published - 1 Apr 1991
Externally published	Yes

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abstract = "The triphasic behavior at the nematic-isotropic transition for a thermotropic main-chain polyester was studied by differential scanning calorimetry and optical microscopy. The demising and thermal evolutions of the macroscopically segregated nematic and isotropic components were monitored upon annealing at different temperatures inside the biphasic gap. The equilibrium distribution of the various molecular species at the nematic-isotropic transition and the thermodynamic biphase range were determined. The observed phase segregation is attributed to chain length heterogeneity of the sample, with the longer chain macromolecules tending to selectively segregate into the nematic phase.",

author = "M. Laus and D. Caretti and Angeloni, \{A. S.\} and G. Galli and E. Chiellini",

year = "1991",

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AU - Laus, M.

AU - Caretti, D.

AU - Angeloni, A. S.

AU - Galli, G.

AU - Chiellini, E.

PY - 1991/4/1

Y1 - 1991/4/1

N2 - The triphasic behavior at the nematic-isotropic transition for a thermotropic main-chain polyester was studied by differential scanning calorimetry and optical microscopy. The demising and thermal evolutions of the macroscopically segregated nematic and isotropic components were monitored upon annealing at different temperatures inside the biphasic gap. The equilibrium distribution of the various molecular species at the nematic-isotropic transition and the thermodynamic biphase range were determined. The observed phase segregation is attributed to chain length heterogeneity of the sample, with the longer chain macromolecules tending to selectively segregate into the nematic phase.

AB - The triphasic behavior at the nematic-isotropic transition for a thermotropic main-chain polyester was studied by differential scanning calorimetry and optical microscopy. The demising and thermal evolutions of the macroscopically segregated nematic and isotropic components were monitored upon annealing at different temperatures inside the biphasic gap. The equilibrium distribution of the various molecular species at the nematic-isotropic transition and the thermodynamic biphase range were determined. The observed phase segregation is attributed to chain length heterogeneity of the sample, with the longer chain macromolecules tending to selectively segregate into the nematic phase.

UR - https://www.scopus.com/pages/publications/0026140069

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ER -

Thermal Investigation of the Nematic-Isotropic Biphase in a Thermotropic Main-Chain Polyester

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