| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2009: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
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| Research Abstract |
We conducted linear and non-liner rheological measurements and also FTIR measurement under a shear flow for hydrogen(H) bonding polymer systems in the melts : random copolymer of vinly acetate and vinyl alcohol, P(VAc-VOH). Stress growth function of this system showed the shear thinning behavior successively to the stress overshoot. This result suggests that H-bonding structure break up under steady shear flow. However, RHEO-ATR-FTIR measurements on the same sample revealed that the number of hydrogen bonds did not change by applying flow fields. This result suggested two possibilities : small change in the number of H-bonds and/ or the structural change from inter-to intra-molecular H-bonds will be responsible for the shear thinning behavior.
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