Polymer Bulletin

, Volume 48, Issue 4–5, pp 381–387

High-temperature X-ray diffraction studies on polyamide6/clay nanocomposites upon annealing

  • Xiaohui Liu
  • Qiuju Wu
  • Qingxin Zhang
  • Lars A. Berglund
  • Zhishen Mo

Summary

The influence of nanodispersed clay on the α crystalline structure of polyamide 6 (PA6) was examined in-situ with X-ray diffraction (XRD) between room temperature and melting. In pure PA6 upon annealing the α crystalline phase was substituted by an unstable pseudohexagonal phase at 150°C, then it transformed into a new stable crystalline structure - high temperature α′ phase above the transition temperature. However, in PA6/clay nanocomposite (PA6CN), the α phase did not present crystalline phase transition on heating. The increase in the annealing temperature only led to continuous intensity variation. The different behaviors were caused by the confined spaces formed by silicate layers, which constrained the mobility of the polymer chains in-between.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Xiaohui Liu
    • 1
  • Qiuju Wu
    • 1
  • Qingxin Zhang
    • 2
  • Lars A. Berglund
    • 1
  • Zhishen Mo
    • 2
  1. 1.Division of Polymer Engineering, Luleå University of Technology, Luleå 97187, Sweden e-mail: qiuju.wu@mb.luth.se, Fax: +46-920-491084SE
  2. 2.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of ChinaCN

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