| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
The microscopic mechanisms determining the Walden product of ionic liquids were investigated by measuring the frequency-dependent conductivity and viscosity experimentally. With lengthening the alkyl chain of the cation, the high-frequency limiting shear modulus decreases, thereby the Walden product decreases. Comparing the ionic liquids with similar alkyl chain lengths, the relaxation of conductivity becomes faster than that of viscosity with an increase in viscosity, which leads to the increase in the Walden product. Both relaxation times becomes faster than that of the microscopic structure determined by the inelastic neutron scattering. The decoupling from the structural relaxation is larger for viscosity than for conductivity, which leads to the decoupling between the relaxations of viscosity and conductivity.
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