Miscibility and free volume in liquid crystalline polymer blends

G. P. Simon, T. T. Hsieh, C. Tiu

Research output: Contribution to journalConference articleOther

Abstract

Thermotropic main-chain liquid crystalline polymers have in themselves advantageous properties of low viscosity, die swell and thermal expansion and high modulus. Due to their expense and useful properties, they have mainly been blended with random coil thermoplastics. Blends of two liquid crystalline polymers have been much less studied, despite often showing synergistic properties of low viscosity and high modulus, even greater than either component. This poster will look at blends of LCPs with different copolymer constituents and copolymer ratios to determine which seem to result in miscibility in rigid rod mixtures. This will be done using relaxational techniques such as dielectric relaxation, dynamic mechanical analysis and the free volume technique, positron annihilation spectroscopy, which will be compared to density measurements.

Original languageEnglish
Number of pages1
JournalPolymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering
Volume76
Publication statusPublished - 1 Jan 1997
EventProceedings of the 1997 Spring ACS Meeting - San Francisco, CA, USA
Duration: 13 Apr 199717 Apr 1997

Cite this

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abstract = "Thermotropic main-chain liquid crystalline polymers have in themselves advantageous properties of low viscosity, die swell and thermal expansion and high modulus. Due to their expense and useful properties, they have mainly been blended with random coil thermoplastics. Blends of two liquid crystalline polymers have been much less studied, despite often showing synergistic properties of low viscosity and high modulus, even greater than either component. This poster will look at blends of LCPs with different copolymer constituents and copolymer ratios to determine which seem to result in miscibility in rigid rod mixtures. This will be done using relaxational techniques such as dielectric relaxation, dynamic mechanical analysis and the free volume technique, positron annihilation spectroscopy, which will be compared to density measurements.",
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T1 - Miscibility and free volume in liquid crystalline polymer blends

AU - Simon, G. P.

AU - Hsieh, T. T.

AU - Tiu, C.

PY - 1997/1/1

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N2 - Thermotropic main-chain liquid crystalline polymers have in themselves advantageous properties of low viscosity, die swell and thermal expansion and high modulus. Due to their expense and useful properties, they have mainly been blended with random coil thermoplastics. Blends of two liquid crystalline polymers have been much less studied, despite often showing synergistic properties of low viscosity and high modulus, even greater than either component. This poster will look at blends of LCPs with different copolymer constituents and copolymer ratios to determine which seem to result in miscibility in rigid rod mixtures. This will be done using relaxational techniques such as dielectric relaxation, dynamic mechanical analysis and the free volume technique, positron annihilation spectroscopy, which will be compared to density measurements.

AB - Thermotropic main-chain liquid crystalline polymers have in themselves advantageous properties of low viscosity, die swell and thermal expansion and high modulus. Due to their expense and useful properties, they have mainly been blended with random coil thermoplastics. Blends of two liquid crystalline polymers have been much less studied, despite often showing synergistic properties of low viscosity and high modulus, even greater than either component. This poster will look at blends of LCPs with different copolymer constituents and copolymer ratios to determine which seem to result in miscibility in rigid rod mixtures. This will be done using relaxational techniques such as dielectric relaxation, dynamic mechanical analysis and the free volume technique, positron annihilation spectroscopy, which will be compared to density measurements.

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M3 - Conference article

VL - 76

JO - Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering

JF - Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering

SN - 0743-0515

ER -