The aim of the thesis was the preparation of polyamide 6/organoclay nanocomposites (PA6/OMMT) using the melt intercalation method in the alloy, which are characterised by improved mechanical and thermal ... więcej

The aim of the thesis was the preparation of polyamide 6/organoclay nanocomposites (PA6/OMMT) using the melt intercalation method in the alloy, which are characterised by improved mechanical and thermal properties and reduced flammability. For this purpose, ammonium salt-modified layered silicates and unmodified aluminosilicates were used as fillers. The best thermal stability and advantageous mechanical properties were found for a polyamide reinforced with a 3 wt% of organo-modified montmorillonite. To reduce the flammability of PA6/OMMT, a modification of the aluminosilicate with phosphorous stabilizers was proposed. Adsorption of disodium H-phosphonate and other commercial stabilizers was performed on the surface of both unmodified clay and organo-modified montmorillonite. Mechanical and thermal properties were determined and flammability was tested. The effect of improvement of thermal stability and reduction of flammability is connected with both a high degree of dispersion obtained for stabilized systems and the stabilizing effect of the nanofiller and stabilizer. The results of structural tests and flammability tests show that adsorption of a layered filler changes the thermal decomposition process. Synthesis of hexadecyltrimethylammonium phosphite was also performed, which was used for the organic modification of sodium montmorillonite. The nanocomposite obtained, which contained such clay, was characterised by the lowest flammability of all polyamide nanomaterials obtained.