Correlation of mechanical properties of clay filled polyamide mouldings with chromatographically measured surface energies

Abstract

Inverse gas chromatography, IGC, has been used to investigate the surface properties of calcined kaolins and the effect of the mechanical properties of a Nylon-6 composite containing the clay. Modification of the kaolin with an aminosilane coupling agent lowered its surface energy so that it was comparable with that of the polymer matrix and changed the surface from being acidic to being predominantly basic. The surface of the nylon was also found to be basic but susceptible to hydrogen bonding. Incorporation of the kaolin into nylon changed the mechanical properties, raised the modulus and toughness of the materials. Better results were achieved for the coated kaolin than the uncoated material and this correlated with the surface energy measurements.

Effect of the Tacticity of PMMA Adsorbed on Alumina and Silica on the Specific Entropy Change of Polymer by Inverse GC

“…IGC can be also used to analyze the solvent-solvent interactions [25], the surface properties of clays [26,27], nanomaterials and clay-polymer composites [28,29] and nanoparticles with respect to their specific surface area, particle size and morphology [30].…”

Analysis of interfacial action of rectorite/thermoplastic polyurethane nanocomposites by inverse gas chromatography and molecular simulation

“…They found that the alkylammonium cations can provide functional groups that can react with the polymer to improve the strength of the interface between the inorganic component and the macromolecule. Inverse gas chromatography (IGC) has been used to investigate the surface properties of calcined kaolins and the effect on the mechanical properties of a nylon-6 composite containing the clay by Ansari and Price [8,9]. They believed that the modification of the kaolin with an aminosilane coupling agent lowered its surface energy so that it was comparable with that of the polymer matrix and changed the surface from being acidic to being predominantly basic.…”

Investigating the surface properties of polymer‐coated clay by IGC

“…However, there is still some hydroxyl functionality present so that a relatively high-energy surface remains. [3] The value of the dispersive component of surface energy for polymer was relatively low. As far as the organic/inorganic system is concerned, polystyrene was expected to minimize the surface energy of sepiolite as in the case of montmorillonite (MMT)-polystyrene sulfonate [16] and calcined kaolin-polyethylene.…”

“…By using probes with a range of properties, the nature of the surface can be defined with good accuracy. [3] Retention time is evaluated to be used in the calculations of some physicochemical properties of solids. Heat-treated natural clay was chosen in this work.…”

“…Heat-treated natural clay was chosen in this work. Using calcined clays [3] as fillers in such composites is the current trend. One of the most suitable types of filler for insulation on rubber compounding is calcined clays, due to their low water adsorption and good extrusion properties.…”