双子プローブによる溶融ポリマーの熱伝導率と装置の開発
書誌事項
- タイトル別名
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- Thermal Conductivity Measurement of Molten Polymers and Development of Apparatus by Means of Twin-probe.
抄録
Determining the thermal conductivity of molten polymers is very important in flow and thermal analyses using computer aided engineering (CAE) programs. The present study introduces a thermal conductivity device that consists of two probes that are inserted into the experimental specimen to be measured and a reference specimen. Using this device, the effect of temperature on thermal conductivity and thermal diffusivity within the range of 50°C to 280°C is determined. The accuracy of the proposed device was determined to be within ±4∼6%. Instrument calibration can be performed easily for each measurement because the instrument incorporates both a reference and measurement probe. The thermal conductivity of crystalline polymers gradually decreased as the temperature was increased, and thermal conductivity shows a minimal value at the melting point. In contrast, the thermal conductivity of amorphous polymers was remarkably independent of temperature. The thermal conductivity of the molten state is 10∼40% smaller than that of the solid crystalline state. In the case of amorphous polymers, thermal conductivity remains relatively constant or increases slightly with increasing temperature. The thermal diffusivity of crystalline polymers showed a similar trend as that of the thermal conductivity, whereas in amorphous polymers thermal diffusivity gradually decreased with increasing temperature.
収録刊行物
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- 成形加工
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成形加工 10 (3), 213-219, 1998
一般社団法人 プラスチック成形加工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679439300736
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- NII論文ID
- 130003691025
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- ISSN
- 18837417
- 09154027
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可