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2002 Fiscal Year Final Research Report Summary

A Basic Study on Material Selection Process from Waste Polymers Utilizing Unsteady Heat Conduction

Research Project

Project/Area Number 12450083
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

SATOH Isao  Tokyo Institute of Technology, Graduate School of Engineering and Science, Professor, 大学院・理工学研究科, 教授 (10170721)

Co-Investigator(Kenkyū-buntansha) SAITO Takushi  Tokyo Institute of Technology, Graduate School of Engineering and Science, Associate Professor, 大学院・理工学研究科, 助教授 (20302937)
Project Period (FY) 2000 – 2002
KeywordsWaste Polymers / Selection of Materials / Unsteady Heat Conduction / Sticking Phenomenon / Interface Temperature / Softening / Rheological Properties / Contact Area
Research Abstract

In this research project, sticking phenomenon occurring between a polymer particle and a heated solid surface has been experimentally investigated, in order to obtain basic understandings about the material selection process from waste polymers, which are the mixture of various kinds of polymer materials, utilizing unsteady heat conduction and the sticking phenomenon occurring between the polymer and the heated surface. Obtained results are summarized as follows :
(1) Sticking phenomenon of polymer particles occurring on a heated solid surface was investigated for various kinds of polymer materials. As the results, it was shown that the sticking between a polymer and a heated surface becomes evident when the initial temperature of heated surface exceeds a certain temperature (an onset temperature), and that the onset temperatures almost correspond to the glass-transition temperature or the melt temperature of polymeric materials and therefore differ for different kind of polymers. This … More means that the waste polymer of various kinds of materials may be separated in each material by utilizing the sticking phenomenon.
(2) In general, waste polymer may have dirt or paint on its surface. Effects of the dirt or paint on the sticking phenomenon were experimentally examined. The results clearly showed that the dirt on the surface of polymer particles results in a slight rise of the sticking onset temperature, but that the sticking characteristics of polymer particles are hardly influenced by the dirt. To the contrary, paint on the polymer particles markedly affects the sticking characteristics. The sticking onset temperature becomes the middle of those for the base polymer and for the paint material.
(3) The interface temperature at the contact point between a polymer particle and a heated surface was measured for various polymer materials and for various initial temperature of the heated surface. The results showed that, under the condition that the sticking between a polymer and a heated surface becomes evident, the interface temperature is a little bit higher than the glass-transition temperature/melt temperature of the polymer material. This results suggests that the sticking of polymeric materials is dominated not only by the "softening" of the polymer, but also by the enlargement of contact area due to deformation of polymer around the contact point.
(4) Rheological properties of polymeric materials were measured around the sticking onset temperature in detail. It was shown that the sticking between a polymer and a heated surface becomes evident when the loss tangent of the polymer exceeds unity, and that under the condition the values of storage/loss moduli are about 10^6 Pa and are independent on the kind of polymer materials. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 佐藤 勲, 斉藤卓志, 岩田正孝: "非定常熱伝導を利用した廃プラスチック分別手法の提案"成形加工シンポジア'00. 111-112 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐藤 勲, 斉藤卓志, 岩田正孝: "熱融着現象を利用した廃プラスチック分別手法の基礎的研究"成形加工シンポジア'00. 321-322 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 杉山 徹, 佐藤 勲, 斉藤卓志: "非定常熱伝導と融着現象を利用した廃プラスチックの分別回収(融着界面温度の測定)"第38回日本伝熱シンポジウム講演論文集. 2. 507-508 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 森 由紀, 佐藤 勲, 斉藤卓志: "非定常熱伝導を利用した廃プラスチック分別手法の分別能"成形加工'01. 65-66 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Saito, T., Satoh, I.: "A Study on Thermal Adhesion of Polymer Materials and Its Application for a Material Selection Process"Proc.the 6th ASME-JSME Thermal Engineering Joint Conference. TED-AJ03-217.pdf (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 森 由紀, 佐藤 勲, 斉藤卓志: "熱可塑性プラスチックの熱融着挙動に与える材料物性の影響"成形加工'03. (掲載予定). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Satoh, I., Saito, T. and Iwata, M.: "Proposal of Waste Plastic Materials Selection Method Utilizing Unsteady Heat Transfer"JSPP'00 Symp. Papers. 111-112 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Satoh, I., Saito, T. and Iwata, M.: "Fundamental Study on Waste Polymer Material Selection Technique Using Thermal Adhesion"JSPP '00 Symp. Papers. 321-322 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugiyama, T., Satoh, I. and Saito T.: "Selection Technique of Waste Polymer Materials Utilizing Unsteady Heat Conduction and Thermal Adhesion - Temperalure Measurement of Adhered Interface"Proc. 38th National Heat Transfer Symp. of Japan. 2. 507-508 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Mori, Y., Satoh, I. and Saito, T.: "Governing Factors of the Selection Method fro Waste Plastic Materials Utilizing an Unsteady Heat Transfer"JSPP '01 Spring Annual Meeting Papers. 65-66 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Saito, T. and Satoh, I.: "A Study on Thermal Adhesion of Polymer Materials and Its Application for a Material Selection Process"Proc. of the 6th ASME-JSME Thermal Engineering Joint Conference. TED-AJ03-217. Pdf. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Mori, Y., Satoh, I. and Saito, T.: "Effect of Material Properties on Thermal Adliesion Behavior of Thermoplastic Polymer Materials"JSPP '03 Spring Annual Meeting Papers. to be printed. (2003)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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