| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
In this study we have proposed to apply THz photoelasticity method to evaluate inside physical properties in plastic products. To verify the validity of introducing THz photoelasticity method, we have performed THz-TDS (Terahertz Time Domain Spectroscopy) to polypropylene (PP) formed by injection molding with various injection conditions. We have confirmed that the residual stress and the crystal orientation are correlated with THz polarization property, which indicate that our proposed method should be valid. The THz response contains many factors like residual stress and crystal orientation. We should isolate such individual factors by driving the evaluation of THz polarization properties in the future work.
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