Abstract
Abstract Montmorillonite (MMT) was modified with cetyl trimethyl ammonium bromide (CTAB) to obtain organomontmorillonite (OMMT) by stirring and pulsed ultrasonic mixing. Polyamide 6 (PA6)/OMMT nanocomposites were then prepared via in-situ polymerization.The resulting OMMT and PA6/OMMT nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results suggested that the OMMT interlayer distance was greatly increased to 3.13 nm due to CTAB being inter-calated into the MMT galleries. The OMMT interlayer distance was further enlarged to 10-20 nm during the polymerization process. The OMMT layers were exfoliated into nanoscale layers and uniformly dispersed in the molten ∈-caprolactam and PA6 matrix, and exfoliated structure nanocomposites were formed.
Highlights
Since the development of Polyamide 6 (PA6)/clay nanocomposites by Toyota researchers [1,2,3,4,5], polymer layered silicate nanocomposites have attracted considerable interest from a wide range of scientific and practical viewpoints due to their unexpected hybrid properties synergistically resulting from their parent components
Polyamide 6 (PA6)/OMMT nanocomposites were prepared via in-situ polymerization.The resulting OMMT and PA6/OMMT nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM)
The results suggested that the OMMT interlayer distance was greatly increased to 3.13 nm due to cetyl trimethyl ammonium bromide (CTAB) being intercalated into the MMT galleries
Summary
Since the development of PA6/clay nanocomposites by Toyota researchers [1,2,3,4,5], polymer layered silicate nanocomposites have attracted considerable interest from a wide range of scientific and practical viewpoints due to their unexpected hybrid properties synergistically resulting from their parent components. Polymer layered silicate nanocomposites synthesized by adding just a small frac-. The type of PA6/clay nanocomposite based on montmorillonite (MMT) is one of the most promising layered silicate based polymer nanocomposites [11,12,13,14,15]. PA6/MMT nanocomposites have superior performance of physical and mechanical properties. They have been extensively used in areas of electronics, transportation, packaging, etc. The organic montmorillonite (OMMT) can be broken down into its nanoscale building blocks and uniformly dispersed in the polymer matrix to form exfoliated nanocomposites during the polymerization process. Many works [16,17,18] have proved that complete exfoliation of silicate layers is the key to achieving polymer/clay nanocomposites with high performance. The PA6/Na-MMT composites were prepared using the same procedure
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