Unusual Crystallization Behavior in Nylon-6 and Nylon-6/Montmorillonite Nanocomposite Films

The crystallization behavior of nylon‐6 and nylon‐6/montmorillonite nanocomposite films with different heat histories was investigated by wide‐angle X‐ray diffraction (WAXD). For nylon‐6 films isothermally crystallized above 170 °C or annealed at 200 °C and then quenched in ice water, a crystalline...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2004-07, Vol.25 (14), p.1340-1344
Main Authors: Zhao, Zhudi, Zheng, Weitao, Yu, Wenxue, Tian, Hongwei, Li, Hujie
Format: Article
Language:English
Subjects:
Applied sciences
Composites
crystallization
Exact sciences and technology
Forms of application and semi-finished materials
heat history
nanocomposites
nylon-6
Polymer industry, paints, wood
Technology of polymers
X-ray
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Summary:The crystallization behavior of nylon‐6 and nylon‐6/montmorillonite nanocomposite films with different heat histories was investigated by wide‐angle X‐ray diffraction (WAXD). For nylon‐6 films isothermally crystallized above 170 °C or annealed at 200 °C and then quenched in ice water, a crystalline peak appeared at 2θ = 28.5°. This crystalline peak was strong in intensity for the former and weak for the latter. However, for nylon‐6 films cooled in air after isothermal crystallization or annealing, no crystalline peak at 2θ = 28.5° was observed in the WAXD patterns. For nylon‐6/montmorillonite nanocomposite films annealed above 140 °C, a crystalline double peak was observed between the α1 and α2 peaks. The possible origins of the peak at 2θ = 28.5° and the crystalline double peak are discussed. WAXD patterns of isothermally crystallized nylon‐6/montmorillonite nanocomposite films.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.200400168