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Ordering Process of Polymers during the Induction Period of Crystallization Observed by the Simultaneous Thermal Analysis and Molecular Vibration Spectroscopy

Research Project

Project/Area Number 09651001
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 高分子構造・物性(含繊維)
Research InstitutionTOKYO METOROPOLITAN UNIVERSITY

Principal Investigator

YOSHIDA Hirohisa  Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (20094287)

Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
KeywordsSimultaneous DSC-FTIR / Induction period of crystallization / Conformation / poly(vinylidene fluoride) / syndiotactic polystyrene / poly(ethylene terephthalate) / ポリエチレンテレフタレート / 緩和現象 / ポリスチレン / X線回折 / シンジオタクチック / コンフォメーション / α-γ転移
Research Abstract

The crystallization mechanism of polymers, especially the ordering process during the induction period of crystallization was investigated by the simultaneous differential scanning calorimeter and Fourie transform infrared spectroscopy (DSC-FTIR). The time resolutions of DSC and FTIR were 1 sec. Phase transition behavior of poly(vinylidene fluoride) (PVDF), syndiotactic polystyrene (sPS), poly(ethylene terephthalate) (PET) and n-alkanes were investigated by DSC-FTIR and DSC-XRD.
The conformational ordering from random to trance-gauche proceeded before the positional ordering of α-form for the crystallization of PVDF from the molten state. Similar conformational ordering was observed for sPS and PET during the induction period of crystallization.
The crystallization process of PET from the glassy state and the molten state were observed by DSC-XRD and DSC-FTIR. Molecular mechanism of crystallization process was discussed from conformational and structural viewpoint. The stacking of aromatic rings due to π-electron interaction caused the nucleation process. Conformational ordering of aromatic part and ethylene part proceeding individually and positional ordering contributed to crystallization enthalpy. The pre-melt crystallization and secondary crystallization process were occurred by the compensation of dis-orders between conformational ordering of aromatic part and ethylene part.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] Hirohisa Yoshida: "Structure formation of PVDF/PMMA blends studied by the simultaneous DSC/FT-IR measurement"J. Thermal Analysis. 49. 101-105 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida: "Structure relaxation of n-alkanes observed by the simultaneous DSC-FTIR method"J. Thermal Analysis Calorimetry. 55. 679-685 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 吉田博久: "同時測定で見る高分子の結晶化過程"熱測定. 24. 141-150 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida: "The simultaneous DSC-FTIR and DSC-XRD measurements as a tool for thermal characterization of polymeric materials"Proceedings of International Conference on Thermophysical Properties of Materials (TPPM99). 231-235 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida: "Liquid-Crystal Formation of Polyesters Contaiing Phenanthrene Moieties in the Main Chain Observed by the Simultaneous DSC/SR-XRD Method"Reports on progress in polymer physics in Japan. 41. 211-212 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida, Masayoshi Honma: "Structure Formation of Syndiotactic Polystyrene From the Molten State Observed by the Simultanneous DSC/SR-XRD Method"Reports on Progress in Polymer Physics in Japan. 41. 303-304 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida: "Structure formation of PVDF/PMMA blends studied by the simultaneous DSC/FT-IR measurement"J. Thermal Analysis. 49. 101-105 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida: "Structure relaxation of n-alkanes observed by the simultaneous DSC-FTIR method"J. Thermal Analysis Calorimetry. 55. 679-685 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida: "The simultaneous DSC-FTIR and Conference DSC-XRD measurements as a tool for thermal characterization of polymeric materials"Proceedings of International on Thermophysical Properties of Materials (TPPM99). 231-235 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida, Keita Masaka, Kazuaki Baba and Shigeo Nakamura: "Liquid-Crystal Formation of Polyesters Containing Phenanthrene Moieties in the Main Chain Observed by the Simultaneous DSC/SR-XRD Method"Reports on Progress in Polymer Physics in Japan. 41. 211-212 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida, Masayoshi Honma: "Structure Formation of Syndiotactic Polystyrene From the Molten State Observed by the Simultaneous DSC/SR-XRD Method"Reports on Progress in Polymer Physics in Japan. 41. 303-304 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida: "Crystallization Process of Polymers Observed By the Simultaneous DSC-XRD and DSC-FTIR"Netsu Sokutei. 26(4). 141-150 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohisa Yoshida: "Structure relaxation of n-alkanes observed by the simultaneous DSC-FTIR method"J.Thermal Analysis Calorimetry,. 55. 679-685 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 吉田博久: "同時測定で見る高分子の結晶化過程"熱測定. 24. 141-150 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hirohisa Yoshida: "The simultaneous DSC-FTIR and DSC-XRD measurements as a tool for thermal characterization of polymeric materials"Proceedings of International Conference on Thermophysical Properties of Materials(TPPM99). 231-235 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hirohisa Yoshida, Keita Masaka, Kazuaki Baba and Shigeo Nakamura: "Liquid-Crystal Formation of Polyesters Contaiing Phenanthrene Moieties in the Main Chain Observed by the Simultaneous DSC/SR-XRD Method" Reports on Progress in Polymer Physics in Japan,. 41. 211-212 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hirohisa Yoshida, Masayoshi Honma: "Structure Formation of Syndiotactic Polystyrene From the Molten State Observed by the Simultaneous DSC/SR-XRD Method" Reports on Progress in Polymer Physics in Japan,. 41. 303-304 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 吉田博久 他: "熱量測定・熱分析ハンドブック" 丸善 日本熱測定学会編, 480 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hirohisa Yoshida: "Structure formation of PVDF/PMMA blends studied by simultaneous DSC/FT-IR measurement" J.Thermal Analysis. 49. 101-105 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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