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Polyamide 66/Clay Nanocomposites via Melt Intercalation
Author(s) -
Liu Xiaohui,
Wu Qiuju
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(20020301)287:3<180::aid-mame180>3.0.co;2-t
Subject(s) - materials science , montmorillonite , silicate , nanocomposite , heat deflection temperature , intercalation (chemistry) , composite material , polyamide , izod impact strength test , compounding , absorption of water , dispersion (optics) , epoxy , organoclay , chemical engineering , organic chemistry , chemistry , physics , optics , engineering , ultimate tensile strength
Polyamide 66/clay nanocomposites (PA66CN) were prepared via a melt compounding method using a new kind of organophilic clay, which was obtained through co‐intercalation of epoxy resin and quaternary ammonium into Na‐montmorillonite. The dispersion effect of silicate layers in the matrix was studied by means of XRD and TEM. The silicate layers were dispersed homogeneously and nearly exfoliated in the matrix as a result of the strong interaction between epoxy groups and PA66. The mechanical properties and heat distortion temperature (HDT) of PA66CN increased dramatically. The notched Izod impact strength of PA66CN was 50% higher than that of PA66 when the clay loading was 5 wt.‐%. Even at 10 wt.‐% clay content, the impact strength was still higher than that of PA66. The finely dispersed silicate layers and the strong interaction between silicate layers and the matrix reduced the water absorption, at 10 wt.‐% clay content; PA66CN only absorbs 60% water compared with PA66. The addition of silicate layers changed the crystal structure in PA66CN.