| Budget Amount *help |
¥46,020,000 (Direct Cost: ¥35,400,000、Indirect Cost: ¥10,620,000)
Fiscal Year 2014: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2013: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2012: ¥28,730,000 (Direct Cost: ¥22,100,000、Indirect Cost: ¥6,630,000)
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| Outline of Final Research Achievements |
In polymer blends, the phase separation kinetics is strongly coupled with the entanglement dynamics of component polymers therein. For basic understanding of this coupling, the entanglement relaxation in homogeneous systems was examined in detail. It turned out that the tube dilation process (relaxation process activated by motion of surrounding chains) is associated with two characteristic length, one being in the direction perpendicular to the chain backbone and determining the stress relaxation level, and the other being in the direction parallel to the backbone and governing the relaxation time. In addition, analysis of local dynamics revealed retardation of the local Rouse relaxation of the fast component due to topological constraint from the slow component. On the basis of these new features (not considered in conventional models), an attempt was made to describe the coupling between the phase separation kinetics and the entanglement dynamics in the blends.
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