Analysis of PA 6 nanocomposites--indentation and creep behavior as a function of temperature and load level using different indentation techniques/Analiza zaleznosci twardosci i pelzania pod obciazeniem nanokompozytow PA 6 od temperatury i sily obciazajacej oraz od glebokosci zaglebienia

The short-term performance (Martens hardness and indentation modulus) and the time-dependent creep behavior of polyamide 6 (PA 6) and two PA 6 nanocomposites containing 3.5 wt % montmorillonite (MMT) or 5 wt % halloysite nanotubes (HNT) were analyzed by different depth-sensing indentation techniques in the nano-, micro- and macro-range of loading as a function of applied load (0.08 -100 N) and temperature (-80 - 60 °C). Additionally, WAXD and DSC measurements were made to establish the morphology-property relationships of the investigated materials while taking into account the skin-core structure of the injection-moulded samples. Keywords: depth-sensing indentation techniques, Martens hardness, indentation modulus, creep behavior, skin-core effect, temperature, polyamide 6, nanocomposites. Za pomocatechniki DSI (Depth Sensing Indentation), z zastosowaniem glebokosci wciskania z zakresu nano, mikro oraz makro, analizowano zaleznosc twardosci indentacyjnej, twardosci Martensa, moduhu wciskania oraz pelzania pod obciazeniem nanokompozytow poliamidu 6 od temperatury (-80 - 60 °C) i przylozonej sily (0,08 - 100 N). Badano nanokompozyty PA 6 napelnione montmorylonitem (3,5 % mas.) oraz nanorurkami haloizytu (5 % mas.). Dodatkowo przy uzyciu technik WAXD oraz DSC oceniano wplyw morfologii badanych materialow na ich wlasciwosci, z uwzglednieniem efektu skin-core w probkach otrzymanych metoda wtryskiwania. Slowa kluczowe: metoda DSI pomiaru twardosci, twardosc Martensa, modul wciskania, pelzanie pod obciazeniem, efekt skin-core, poliamid 6, nanokompozyty.