Metal–polymer nanocomposites produced by the melt‐compounding interaction of an aliphatic polyamide with metal particles

Abstract

Composites prepared at 2008C by the melt compounding of copolymer polyamide 6/66 and ferric chloride, ferric oxalate, cupric chloride, cupric formiate, cupric acetate, Cr-carbonyl, Mo-carbonyl, or W-carbonyl have been studied. The solution stability and aggregation suppression for nanoparticles in a polyamide can be explained by the formation of stable polymer-metal complexes. The nitrogen atoms of amide and amine groups of polymers serve as ligands for the coordination compounds that form. The dynamic viscosity of the solutions suggests that Cr-carbonyl forms mostly intermolecular complexes, whereas ferric oxalate, ferric chloride, cupric formiate, cupric acetate, cupric chloride, Cr-carbonyl, Mo-carbonyl, and W-carbonyl form intramolecular complexes. The critical concentrations for metal-containing compounds at which a dispersion rises to nanodimensions without aggregating in the polymer matrix under the experimental conditions are 0.024 wt % for ferric oxalate, 0.12 wt % for ferric chloride, 0.08 wt % for cupric formiate, 0.096 wt % for cupric acetate, and 0.19 wt % for cupric chloride. Metal carbonyls undergo dispersion (with their concentration up to 5 wt %) in polyamide 6/66 without aggregating into larger formations.

Polymer Nanocomposites with Thermoplastic Matrices—Processing and Tribology

“…The nanocomposites were prepared by an extrusion technique using a static mixer. [135] Figure 3 shows that addition of these organoclays to PA6 caused a strong effect on the friction parameters (friction coefficient [f ] and wear rate [I]). Of importance are both the concentration and type of the organoclay used.…”

“…The grafting process for producing the compatibilizer has been described elsewhere. [135] Nano-Cu was prepared by thermolysis of copper formate in the PA-melt using the single-screw reactor-extruder equipped with a static mixer. [165] At 1.5-wt % Cu concentration, the wear rate of the blended material dropped as much as three times while the value of f did not vary (Fig.…”

IMMOBILIZATION AND STUDY OF TRYPSIN ON MAGNETITE-Fe3O4 NANOPARTICLE-BASED NATURAL AND SYNTHETIC POLYMER HYDROGELS

“…Nanocomponents were able to create a number of changes in classical molecular systems and lead to obtaining substances with completely new properties. Nanocomposites containing metal nanoparticles are widely used in catalysis [9], electronics [10], sensor development [11], luminescent devices [12], medicine and biotechnology [13].…”