Influence of Aminosilane Coupling Agent on Aromatic Polyamide/Intercalated Clay Nanocomposites

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Aminosilane grafted and diamine modified reactive montmorillonite was exploited to generate aromatic polyamide based nanocomposites. For better compatibility, the hydrophilic nature of montmorillonite was changed into organophilic using 1,4-phenylenediamine, and the hydroxyl groups present on the clay surface and edges were used to graft 3-aminopropyltriethoxysilane (APTS) on clay sheets. The dispersion of clay was monitored in the polyamide obtained from 1,4-phenylenediamine, 4,4'-oxydianiline, and isophthaloyl chloride. These chains were converted into carbonyl chloride ends to interact with free amine groups of grafted APTS and diamine. Thin films were probed for FTIR, XRD, SEM, TEM, tensile testing, TGA, and DSC measurements. The results described ample dispersion of clay in the nanocomposites with tensile strength increased 110% and elongation increased 172% upon the addition of 4-6 wt % clay. Thermal decomposition temperatures of the nanocomposites were in the range 425-480 degrees C. The glass transition temperature increased up to 142.4 degrees C with 6 wt % addition of organoclay.
Publisher
AMER CHEMICAL SOC
Issue Date
2013-05
Language
English
Article Type
Article
Keywords

ALIPHATIC POLYAMIDE; MONTMORILLONITE NANOCOMPOSITES; POLYMER/CLAY NANOCOMPOSITES; SILICATE NANOCOMPOSITES; MECHANICAL-PROPERTIES; MELT INTERCALATION; BARRIER PROPERTIES; POLYMERIZATION; COMPOSITES; MORPHOLOGY

Citation

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.52, no.21, pp.6908 - 6915

ISSN
0888-5885
DOI
10.1021/ie400463z
URI
http://hdl.handle.net/10203/174139
Appears in Collection
EEW-Journal Papers(저널논문)
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