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Lawrence A Woolf - One of the best experts on this subject based on the ideXlab platform.
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temperature and Pressure Dependence of the viscosity of the ionic liquid 1 butyl 3 methylimidazolium tetrafluoroborate viscosity and density relationships in ionic liquids
Journal of Chemical & Engineering Data, 2007Co-Authors: Kenneth R Harris, Lawrence A WoolfAbstract:The viscosity of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4) has been measured between (0 and 80) °C with a falling-body viscometer. High-Pressure measurements were made at (10, 25, 50, and 75) °C to a maximum Pressure of 300 MPa. The expanded uncertainty is estimated at ± 2 %. Modified Litovitz and Vogel−Fulcher−Tammann (VFT) equations are used to represent the temperature and Pressure Dependence. The Angell equation relating the strength parameter D, the VFT parameter T0, and the glass temperature Tg is again confirmed. Comparing D for the salts [BMIM]PF6, [HMIM]PF6, [OMIM]PF6, [BMIM]BF4, [OMIM]BF4, and [BMIM][Tf2N], we find D([BMIM]+) < D([HMIM]+) < D([OMIM]+) where the anion is common and D([Tf2N]-) < D(BF4-) < D(PF6-) where the cation is common. Densities and thermal expansivities between (0 and 90) °C at atmospheric Pressure with overall uncertainty estimated at ± 0.000 05 g·cm-3 and ± 0.02·10-3 K-1 are also reported. The densities are compared with our previously publ...
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temperature and Pressure Dependence of the viscosity of the ionic liquids 1 hexyl 3 methylimidazolium hexafluorophosphate and 1 butyl 3 methylimidazolium bis trifluoromethylsulfonyl imide
Journal of Chemical & Engineering Data, 2007Co-Authors: Kenneth R Harris, Mitsuhiro Kanakubo And, Lawrence A WoolfAbstract:The viscosities of the ionic liquids 1-methyl-3-hexylimidazolium hexafluorophosphate, [HMIM]PF6, and 1-butyl-3-methylimidazolium bis(trifluorosulfonyl)imide, [BMIM][Tf2N], have been measured between (0 and 80) °C and at maximum Pressures of 238 MPa ([HMIM]PF6) and 300 MPa ([BMIM][Tf2N]) at 75 °C with a falling-body viscometer. The overall uncertainty is estimated at ± 2 %. Modified Litovitz and Vogel−Fulcher−Tammann (VFT) equations are used to represent the temperature and Pressure Dependence. The Angell equation relating the strength factor D, the VFT parameter T0, and the glass temperature Tg is confirmed. Densities between (0 and 90) °C at atmospheric Pressure with an overall uncertainty estimated at ± 0.000 05 g·cm-3 are also reported.
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temperature and Pressure Dependence of the viscosity of the ionic liquids 1 methyl 3 octylimidazolium hexafluorophosphate and 1 methyl 3 octylimidazolium tetrafluoroborate
Journal of Chemical & Engineering Data, 2006Co-Authors: Kenneth R Harris, Mitsuhiro Kanakubo And, Lawrence A WoolfAbstract:The viscosities of the ionic liquids 1-methyl-3-octylimidazolium hexafluorophosphate, [OMIM]PF6, and 1-methyl-3-octylimidazolium tetrafluoroborate [OMIM]BF4, have been measured between (0 and 80) °C and at Pressures to 176 MPa ([OMIM]PF6) and 224 MPa ([OMIM]BF4) with a falling-body viscometer. The overall uncertainty is estimated at ± (2 to 3) %. Modified Litovitz and Vogel−Fulcher−Tammann equations are used to represent the temperature and Pressure Dependence. The T0 parameter for the latter is found to be consistent with Angell's relationship linking T0 and the strength parameter D with the glass temperature Tg. Densities between (0 and 90) °C at atmospheric Pressure are also reported for both substances. These have an overall uncertainty estimated at ± 0.00005 g·cm-3. The in-built viscosity correction for the Anton-Paar DMA5000 densimeter was confirmed using high-viscosity reference standards to an upper limit of 16 Pa·s.
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temperature and Pressure Dependence of the viscosity of the ionic liquid 1 butyl 3 methylimidazolium hexafluorophosphate
Journal of Chemical & Engineering Data, 2005Co-Authors: Kenneth R Harris, Lawrence A Woolf, Mitsuhiro KanakuboAbstract:New measurements have been made for the viscosity of the room-temperature ionic liquid 1-butyl- 3-methylimidazolium hexafluorophosphate ([BMIM]PF6) between (0 and 80) °C with a falling-body viscometer. High-Pressure measurements were made at (25, 35, 50, 60, and 70) °C. The overall uncertainty is estimated at ± (2 to 3) %. Atmospheric Pressure densities obtained with a vibrating tube densimeter are also reported for temperatures between (0 and 90) °C with an overall uncertainty estimated at ± 0.00005 g·cm-3. The viscosity behavior is qualitatively different from that of molecular liquids, with isotherms being best fitted as functions of the applied Pressure rather than as functions of the molar volume. Modified Litovitz and Vogel−Fulcher−Tammann equations have been used to incorporate both the temperature and Pressure Dependence. Interestingly, the T0 parameter of the VFT equation appears to be independent of Pressure within the state point range of the data, but the Angell strength parameter increases wi...
Kenneth R Harris - One of the best experts on this subject based on the ideXlab platform.
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temperature and Pressure Dependence of the viscosity of the ionic liquid 1 butyl 3 methylimidazolium tetrafluoroborate viscosity and density relationships in ionic liquids
Journal of Chemical & Engineering Data, 2007Co-Authors: Kenneth R Harris, Lawrence A WoolfAbstract:The viscosity of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4) has been measured between (0 and 80) °C with a falling-body viscometer. High-Pressure measurements were made at (10, 25, 50, and 75) °C to a maximum Pressure of 300 MPa. The expanded uncertainty is estimated at ± 2 %. Modified Litovitz and Vogel−Fulcher−Tammann (VFT) equations are used to represent the temperature and Pressure Dependence. The Angell equation relating the strength parameter D, the VFT parameter T0, and the glass temperature Tg is again confirmed. Comparing D for the salts [BMIM]PF6, [HMIM]PF6, [OMIM]PF6, [BMIM]BF4, [OMIM]BF4, and [BMIM][Tf2N], we find D([BMIM]+) < D([HMIM]+) < D([OMIM]+) where the anion is common and D([Tf2N]-) < D(BF4-) < D(PF6-) where the cation is common. Densities and thermal expansivities between (0 and 90) °C at atmospheric Pressure with overall uncertainty estimated at ± 0.000 05 g·cm-3 and ± 0.02·10-3 K-1 are also reported. The densities are compared with our previously publ...
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temperature and Pressure Dependence of the viscosity of the ionic liquids 1 hexyl 3 methylimidazolium hexafluorophosphate and 1 butyl 3 methylimidazolium bis trifluoromethylsulfonyl imide
Journal of Chemical & Engineering Data, 2007Co-Authors: Kenneth R Harris, Mitsuhiro Kanakubo And, Lawrence A WoolfAbstract:The viscosities of the ionic liquids 1-methyl-3-hexylimidazolium hexafluorophosphate, [HMIM]PF6, and 1-butyl-3-methylimidazolium bis(trifluorosulfonyl)imide, [BMIM][Tf2N], have been measured between (0 and 80) °C and at maximum Pressures of 238 MPa ([HMIM]PF6) and 300 MPa ([BMIM][Tf2N]) at 75 °C with a falling-body viscometer. The overall uncertainty is estimated at ± 2 %. Modified Litovitz and Vogel−Fulcher−Tammann (VFT) equations are used to represent the temperature and Pressure Dependence. The Angell equation relating the strength factor D, the VFT parameter T0, and the glass temperature Tg is confirmed. Densities between (0 and 90) °C at atmospheric Pressure with an overall uncertainty estimated at ± 0.000 05 g·cm-3 are also reported.
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temperature and Pressure Dependence of the viscosity of the ionic liquids 1 methyl 3 octylimidazolium hexafluorophosphate and 1 methyl 3 octylimidazolium tetrafluoroborate
Journal of Chemical & Engineering Data, 2006Co-Authors: Kenneth R Harris, Mitsuhiro Kanakubo And, Lawrence A WoolfAbstract:The viscosities of the ionic liquids 1-methyl-3-octylimidazolium hexafluorophosphate, [OMIM]PF6, and 1-methyl-3-octylimidazolium tetrafluoroborate [OMIM]BF4, have been measured between (0 and 80) °C and at Pressures to 176 MPa ([OMIM]PF6) and 224 MPa ([OMIM]BF4) with a falling-body viscometer. The overall uncertainty is estimated at ± (2 to 3) %. Modified Litovitz and Vogel−Fulcher−Tammann equations are used to represent the temperature and Pressure Dependence. The T0 parameter for the latter is found to be consistent with Angell's relationship linking T0 and the strength parameter D with the glass temperature Tg. Densities between (0 and 90) °C at atmospheric Pressure are also reported for both substances. These have an overall uncertainty estimated at ± 0.00005 g·cm-3. The in-built viscosity correction for the Anton-Paar DMA5000 densimeter was confirmed using high-viscosity reference standards to an upper limit of 16 Pa·s.
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temperature and Pressure Dependence of the viscosity of the ionic liquid 1 butyl 3 methylimidazolium hexafluorophosphate
Journal of Chemical & Engineering Data, 2005Co-Authors: Kenneth R Harris, Lawrence A Woolf, Mitsuhiro KanakuboAbstract:New measurements have been made for the viscosity of the room-temperature ionic liquid 1-butyl- 3-methylimidazolium hexafluorophosphate ([BMIM]PF6) between (0 and 80) °C with a falling-body viscometer. High-Pressure measurements were made at (25, 35, 50, 60, and 70) °C. The overall uncertainty is estimated at ± (2 to 3) %. Atmospheric Pressure densities obtained with a vibrating tube densimeter are also reported for temperatures between (0 and 90) °C with an overall uncertainty estimated at ± 0.00005 g·cm-3. The viscosity behavior is qualitatively different from that of molecular liquids, with isotherms being best fitted as functions of the applied Pressure rather than as functions of the molar volume. Modified Litovitz and Vogel−Fulcher−Tammann equations have been used to incorporate both the temperature and Pressure Dependence. Interestingly, the T0 parameter of the VFT equation appears to be independent of Pressure within the state point range of the data, but the Angell strength parameter increases wi...
Zhiwei Dong - One of the best experts on this subject based on the ideXlab platform.
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modeling study on Pressure Dependence of plasma structure and formation in 110 ghz microwave air breakdown
Applied Physics Letters, 2011Co-Authors: Qianhong Zhou, Zhiwei DongAbstract:Recent experimental studies of 110 GHz microwave air volume breakdown have shown that as Pressure is decreased from atmosphere to a few torr, the discharge transitions from a well-defined array to a smeared-out array and finally to a diffuse plasma. In this letter, a two-dimensional model coupling plasma fluid equations and Maxwell equations is used to simulate the Pressure Dependence of plasma structure and formation under conditions similar to the experiments. The modeling Pressure Dependence of plasma structures in H plane and E plane is qualitatively consistent with the experimental observation. The quantitative discrepancy between modeling and experimental results is explained. The simulations allow a good understanding of plasma structure at different Pressures in microwave volume breakdown.
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modeling study on Pressure Dependence of plasma structure and formation in 110 ghz microwave air breakdown
Applied Physics Letters, 2011Co-Authors: Qianhong Zhou, Zhiwei DongAbstract:Recent experimental studies of 110 GHz microwave air volume breakdown have shown that as Pressure is decreased from atmosphere to a few torr, the discharge transitions from a well-defined array to a smeared-out array and finally to a diffuse plasma. In this letter, a two-dimensional model coupling plasma fluid equations and Maxwell equations is used to simulate the Pressure Dependence of plasma structure and formation under conditions similar to the experiments. The modeling Pressure Dependence of plasma structures in H plane and E plane is qualitatively consistent with the experimental observation. The quantitative discrepancy between modeling and experimental results is explained. The simulations allow a good understanding of plasma structure at different Pressures in microwave volume breakdown.
Mitsuhiro Kanakubo - One of the best experts on this subject based on the ideXlab platform.
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temperature and Pressure Dependence of the viscosity of the ionic liquid 1 butyl 3 methylimidazolium hexafluorophosphate
Journal of Chemical & Engineering Data, 2005Co-Authors: Kenneth R Harris, Lawrence A Woolf, Mitsuhiro KanakuboAbstract:New measurements have been made for the viscosity of the room-temperature ionic liquid 1-butyl- 3-methylimidazolium hexafluorophosphate ([BMIM]PF6) between (0 and 80) °C with a falling-body viscometer. High-Pressure measurements were made at (25, 35, 50, 60, and 70) °C. The overall uncertainty is estimated at ± (2 to 3) %. Atmospheric Pressure densities obtained with a vibrating tube densimeter are also reported for temperatures between (0 and 90) °C with an overall uncertainty estimated at ± 0.00005 g·cm-3. The viscosity behavior is qualitatively different from that of molecular liquids, with isotherms being best fitted as functions of the applied Pressure rather than as functions of the molar volume. Modified Litovitz and Vogel−Fulcher−Tammann equations have been used to incorporate both the temperature and Pressure Dependence. Interestingly, the T0 parameter of the VFT equation appears to be independent of Pressure within the state point range of the data, but the Angell strength parameter increases wi...
Mitsuhiro Kanakubo And - One of the best experts on this subject based on the ideXlab platform.
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temperature and Pressure Dependence of the viscosity of the ionic liquids 1 hexyl 3 methylimidazolium hexafluorophosphate and 1 butyl 3 methylimidazolium bis trifluoromethylsulfonyl imide
Journal of Chemical & Engineering Data, 2007Co-Authors: Kenneth R Harris, Mitsuhiro Kanakubo And, Lawrence A WoolfAbstract:The viscosities of the ionic liquids 1-methyl-3-hexylimidazolium hexafluorophosphate, [HMIM]PF6, and 1-butyl-3-methylimidazolium bis(trifluorosulfonyl)imide, [BMIM][Tf2N], have been measured between (0 and 80) °C and at maximum Pressures of 238 MPa ([HMIM]PF6) and 300 MPa ([BMIM][Tf2N]) at 75 °C with a falling-body viscometer. The overall uncertainty is estimated at ± 2 %. Modified Litovitz and Vogel−Fulcher−Tammann (VFT) equations are used to represent the temperature and Pressure Dependence. The Angell equation relating the strength factor D, the VFT parameter T0, and the glass temperature Tg is confirmed. Densities between (0 and 90) °C at atmospheric Pressure with an overall uncertainty estimated at ± 0.000 05 g·cm-3 are also reported.
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temperature and Pressure Dependence of the viscosity of the ionic liquids 1 methyl 3 octylimidazolium hexafluorophosphate and 1 methyl 3 octylimidazolium tetrafluoroborate
Journal of Chemical & Engineering Data, 2006Co-Authors: Kenneth R Harris, Mitsuhiro Kanakubo And, Lawrence A WoolfAbstract:The viscosities of the ionic liquids 1-methyl-3-octylimidazolium hexafluorophosphate, [OMIM]PF6, and 1-methyl-3-octylimidazolium tetrafluoroborate [OMIM]BF4, have been measured between (0 and 80) °C and at Pressures to 176 MPa ([OMIM]PF6) and 224 MPa ([OMIM]BF4) with a falling-body viscometer. The overall uncertainty is estimated at ± (2 to 3) %. Modified Litovitz and Vogel−Fulcher−Tammann equations are used to represent the temperature and Pressure Dependence. The T0 parameter for the latter is found to be consistent with Angell's relationship linking T0 and the strength parameter D with the glass temperature Tg. Densities between (0 and 90) °C at atmospheric Pressure are also reported for both substances. These have an overall uncertainty estimated at ± 0.00005 g·cm-3. The in-built viscosity correction for the Anton-Paar DMA5000 densimeter was confirmed using high-viscosity reference standards to an upper limit of 16 Pa·s.
