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Investigation on Unusual Crystallization Behavior in Polyamide 6/Montmorillonite Nanocomposites
Author(s) -
Liu Xiaohui,
Wu Qiuju,
Berglund Lars A.,
Qi Zongneng
Publication year - 2002
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20020801)287:8<515::aid-mame515>3.0.co;2-b
Subject(s) - crystallinity , montmorillonite , materials science , differential scanning calorimetry , nanocomposite , crystallization , polyamide , intercalation (chemistry) , composite material , epoxy , chemical engineering , polymer chemistry , organic chemistry , chemistry , physics , engineering , thermodynamics
The crystallization behavior and crystal structure of polyamide 6/montmorillonite (PA6/MMT) nanocomposites were investigated by differential scanning calorimetry and X‐ray diffraction, and an interesting behavior was observed. The material was prepared via melt compounding using an organophilic clay obtained by co‐intercalation of epoxy resin and quaternary ammonium into Na‐montmorillonite. A maximum in degree of crystallinity was obtained at 5 wt.‐% MMT and the reasons for this, based on the MMT layer distribution, were discussed. The degree of crystallinity showed a strong dependence on the cooling rates. In contrast with typical behavior, a higher cooling rate resulted in a higher degree of crystallinity. In nanocomposites, the γ‐crystalline phase was dominant.