Rheological and Dielectric Behavior of Polyisoprene under Pressurized Carbon Dioxide
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- Uno Akiko
- Institute for Chemical Research, Kyoto University
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- Matsumiya Yumi
- Institute for Chemical Research, Kyoto University
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- Masubuchi Yuichi
- Institute for Chemical Research, Kyoto University
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- Watanabe Hiroshi
- Institute for Chemical Research, Kyoto University
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説明
For a well-entangled polyisoprene (PI; molecular weight = 260k) equilibrated under pressurized carbon dioxide (CO2) at 25 °C, linear viscoelastic and dielectric data, respectively, were measured with a stress-controlled rheometer and a dielectric bridge being equipped with respective high-pressure cells. The viscoelastic and dielectric data shifted to higher frequencies with increasing CO2 pressure, indicating that the pressurized CO2 dissolved into PI thereby accelerating the global motion of PI. For those data at various CO2 pressure, time-CO2 pressure superposition held well and a single master curve was obtained, and the horizontal/vertical shift factors were consistent for the viscoelastic and dielectric data. These results indicated that the dissolved CO2 behaved just as an ordinal solvent to accelerate the global motion of PI as in ordinary solutions. In fact, the dynamic tube dilation (DTD) relationship between the viscoelastic and dielectric data, known to be valid for ordinary solutions/bulk of linear PI, was found to work also the PI/CO2 system, which confirmed the simple solvent role of the pressurized CO2 for the global motion of PI. Thus, the knowledge for ordinary polymer solutions would work for processing of polymer/CO2 systems.
収録刊行物
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- 日本レオロジー学会誌
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日本レオロジー学会誌 38 (3), 117-123, 2010
一般社団法人 日本レオロジー学会
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詳細情報 詳細情報について
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- CRID
- 1390282680068697600
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- NII論文ID
- 10029818913
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- NII書誌ID
- AN00198812
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- COI
- 1:CAS:528:DC%2BC3cXhtVCrs7vF
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- ISSN
- 21864586
- 03871533
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- NDL書誌ID
- 10746539
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可