Evolution Process of Regular Structure in Isothermal Crystallization Phenomena of Crystalline Polymers Viewed from Synchrotron Small- and Wide-Angle X-ray Scatterings and Vibrational Spectroscopy

DOI Web Site 7 Citations 74 References
  • TASHIRO Kohji
    Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute
  • REDDY Kummetha Raghunatha
    Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute
  • NISHIYAMA Asami
    Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute
  • HANESAKA Makoto
    Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute
  • TSUJI Sawako
    Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute
  • HASHIDA Tomoko
    Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute
  • WEIYU Cao
    Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute
  • MASUNAGA Hiroyasu
    Japan Synchrotron Radiation Research Institute (JASRI)
  • SASAKI Sono
    Japan Synchrotron Radiation Research Institute (JASRI)
  • TAKATA Masaki
    Japan Synchrotron Radiation Research Institute (JASRI) The RIKEN Harima Institute

Bibliographic Information

Other Title
  • 放射光小角広角Ｘ線散乱および振動分光から眺めた高分子の等温結晶化現象における規則構造発展過程
  • ホウシャコウ ショウカク コウカク Xセン サンラン オヨビ シンドウ ブンコウ カラ ナガメタ コウブンシ ノ トウオン ケッショウカ ゲンショウ ニ オケル キソク コウゾウ ハッテン カテイ

Search this article

Abstract

The evolution processes of regular structure in isothermal crystallization phenomena of crystalline polymers have been investigated from the viewpoints of molecular level, crystal lattice, and higher-order structure on the basis of time-dependent infrared spectral data and synchrotron small- (SAXS) and wide-angle X-ray scattering (WAXD) data. The polymers treated here were isotactic polypropylene (iPP), nylon 10/10 and polyoxymethylene (POM). In the case of iPP, the formation and growing processes of regular helical segments in the molten state are described by utilizing the concept of critical sequential length for infrared bands. Combination of these spectroscopic data with the SAXS and WAXD data clarifies the formation process of domains consisting of regular helical segments, the increment of correlation of neighboring domains, and the development of stacked lamellar structure, during which the remarkable growth of crystal lattices consisting of regular helices occurs in parallel. In the case of nylon 10/10, weak hydrogen bonds are formed between amide groups even in the molten state. Once the isothermal crystallization starts to occur, these more-or-less correlated domains built up by the hydrogen bonds are formed followed by the formation of crystal lattices consisting of relatively regular methylene segments. Such growth is quite different from the case of iPP crystallization. The study of POM is based on the observation of infrared bands intrinsic to the folded chain crystals (FCC) and extended chain crystals (ECC). From the time-resolved measurements of these infrared bands as well as the SAXS and WAXD in the isothermal crystallization process of POM, we clarified that the lamellar structure of FCC morphology is formed at first. Then some new lamellae are formed in between these original lamellae, resulting in the formation of ECC parts in which the regular helices pass through the several neighboring lamellae as taut tie chains.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 66 (12), 536-549, 2009

    The Society of Polymer Science, Japan

Citations (7)*help

See more

References(74)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top