2011 Fiscal Year Final Research Report
Study on Time Resolved Molecular Orientation of Hydrogen-Bonding Polymers by Polarized ATR-FTIR Measurement under a Flow Field
| Project/Area Number |
21350126
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | Osaka University |
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Principal Investigator |
URAKAWA Osamu 大阪大学, 大学院・理学研究科, 講師 (70273539)
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| Co-Investigator(Kenkyū-buntansha) |
INOUE Tadashi 大阪大学, 大学院・理学研究科, 教授 (80201937)
SHIKATA Toshiyuki 大阪大学, 大学院・理学研究科, 准教授 (10178858)
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| Project Period (FY) |
2009 – 2011
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| Keywords | レオロジー / 水素結合 / ATR-FTIR / 高分子 |
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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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