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

✍ Scribed by Zhudi Zhao; Weitao Zheng; Wenxue Yu; Hongwei Tian; Hujie Li

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 130 KB
• Volume: 25
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200400168

✦ Synopsis

Abstract

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 2__θ__ = 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 2__θ__ = 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 __α__1 and α__2 peaks. The possible origins of the peak at 2__θ = 28.5° and the crystalline double peak are discussed.

WAXD patterns of isothermally crystallized nylon‐6/montmorillonite nanocomposite films.

magnified imageWAXD patterns of isothermally crystallized nylon‐6/montmorillonite nanocomposite films.