| Project/Area Number |
16550172
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Polymer/Textile materials
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| Research Institution | Kanazawa University |
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Principal Investigator |
NITTA Koh-hei Kanazawa University, Graduate School of Natural Science and Technology, Professor, 自然科学研究科, 教授 (70260560)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Kenji Kanazawa University, Graduate School of Natural Science and Technology, Associate Professor, 自然科学研究科, 助教授 (00216714)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2004: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | near-infrared spectrum / rheo-optics / yield behavior / tensile properties / polypropylene / polyethylene / 近赤外分光法 / イソタクチックポリプロピレン |
|---|
| Research Abstract |
A rheo-optical study has been developed to examine the nature of the structural changes, using the near-infrared spectroscopy. In this work, we investigated the strain (ε) dependence of structural changes of isotactic polypropylene (iPP) and polyethylene (PE) materials during uniaxially stretching using a rheo-optical technique ; in which the near-infrared spectra and tensile stress were simultaneously measured as a function of elongation time. It was found that the absorption coefficients of near-infrared spectra had a minimum at yield point and then reached a maximum at around the neck initiation, indicating that the main-chain motion is restricted by stretching up to the yield point. The yield point could represent the onset of the release of the molecular motion.
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