Structure and molecular mobility studies in novel polyurethane ionomers based on poly(ethylene oxide)

G. Polizos; A. Kyritsis; P. Pissis; V. V. Shilov; V. V. Shevchenko

doi:10.1016/S0167-2738(00)00609-3

Structure and molecular mobility studies in novel polyurethane ionomers based on poly(ethylene oxide)

G. Polizos, A. Kyritsis, P. Pissis, V. V. Shilov, V. V. Shevchenko

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

26 Scopus citations

Abstract

Novel polyurethane ionomers based on poly(ethylene oxide) with nonionic hard segments of varying length and flexible segments containing alkali ions (or protons) have been prepared and their structure-property relationships have been investigated. Differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS) were employed for structural investigation, whereas molecular mobility and ionic conductivity were studied by means of thermally stimulated depolarization currents (TSDC) techniques and of broadband (10^-2-10⁹ Hz) dielectric relaxation spectroscopy (DRS). The ionomers are characterized by the coexistence of the segment microphase separation and the ionic group segregation morphologies. Crystallization is observed at low hard segment contents (melting at about 305 K), the tendency for crystallization decreasing upon hard segment extension and decreasing upon neutralization. Values of ionic conductivity are in the range of 10^-4 S/m at 323 K, the conductivity in the amorphous polyurethanes being governed by the motion of the polymeric chains.

Original language	English
Pages (from-to)	1139-1146
Number of pages	8
Journal	Solid State Ionics
Volume	136-137
DOIs	https://doi.org/10.1016/S0167-2738(00)00609-3
State	Published - Nov 2 2000
Externally published	Yes

Funding

This work was supported by the INTAS project 97-1936.

Funders	Funder number
INTAS	97-1936

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10.1016/S0167-2738(00)00609-3

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title = "Structure and molecular mobility studies in novel polyurethane ionomers based on poly(ethylene oxide)",

abstract = "Novel polyurethane ionomers based on poly(ethylene oxide) with nonionic hard segments of varying length and flexible segments containing alkali ions (or protons) have been prepared and their structure-property relationships have been investigated. Differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS) were employed for structural investigation, whereas molecular mobility and ionic conductivity were studied by means of thermally stimulated depolarization currents (TSDC) techniques and of broadband (10-2-109 Hz) dielectric relaxation spectroscopy (DRS). The ionomers are characterized by the coexistence of the segment microphase separation and the ionic group segregation morphologies. Crystallization is observed at low hard segment contents (melting at about 305 K), the tendency for crystallization decreasing upon hard segment extension and decreasing upon neutralization. Values of ionic conductivity are in the range of 10-4 S/m at 323 K, the conductivity in the amorphous polyurethanes being governed by the motion of the polymeric chains.",

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AU - Polizos, G.

AU - Kyritsis, A.

AU - Pissis, P.

AU - Shilov, V. V.

AU - Shevchenko, V. V.

PY - 2000/11/2

Y1 - 2000/11/2

N2 - Novel polyurethane ionomers based on poly(ethylene oxide) with nonionic hard segments of varying length and flexible segments containing alkali ions (or protons) have been prepared and their structure-property relationships have been investigated. Differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS) were employed for structural investigation, whereas molecular mobility and ionic conductivity were studied by means of thermally stimulated depolarization currents (TSDC) techniques and of broadband (10-2-109 Hz) dielectric relaxation spectroscopy (DRS). The ionomers are characterized by the coexistence of the segment microphase separation and the ionic group segregation morphologies. Crystallization is observed at low hard segment contents (melting at about 305 K), the tendency for crystallization decreasing upon hard segment extension and decreasing upon neutralization. Values of ionic conductivity are in the range of 10-4 S/m at 323 K, the conductivity in the amorphous polyurethanes being governed by the motion of the polymeric chains.

AB - Novel polyurethane ionomers based on poly(ethylene oxide) with nonionic hard segments of varying length and flexible segments containing alkali ions (or protons) have been prepared and their structure-property relationships have been investigated. Differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS) were employed for structural investigation, whereas molecular mobility and ionic conductivity were studied by means of thermally stimulated depolarization currents (TSDC) techniques and of broadband (10-2-109 Hz) dielectric relaxation spectroscopy (DRS). The ionomers are characterized by the coexistence of the segment microphase separation and the ionic group segregation morphologies. Crystallization is observed at low hard segment contents (melting at about 305 K), the tendency for crystallization decreasing upon hard segment extension and decreasing upon neutralization. Values of ionic conductivity are in the range of 10-4 S/m at 323 K, the conductivity in the amorphous polyurethanes being governed by the motion of the polymeric chains.

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JO - Solid State Ionics

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ER -

Structure and molecular mobility studies in novel polyurethane ionomers based on poly(ethylene oxide)

Abstract

Funding

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