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Unusual Crystallization Behavior in Nylon‐6 and Nylon‐6/Montmorillonite Nanocomposite Films
Author(s) -
Zhao Zhudi,
Zheng Weitao,
Yu Wenxue,
Tian Hongwei,
Li Hujie
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400168
Subject(s) - montmorillonite , nanocomposite , materials science , nylon 6 , crystallization , isothermal process , annealing (glass) , nylon 66 , composite material , chemical engineering , polymer chemistry , polymer , polyamide , physics , engineering , thermodynamics
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.