THE BEHAVIOUR OF CROSS-LINKING FILLED PBT MEASURED BY NANO-HARDNESS

Abstract

Radiation crosslinking of filled PBT is a well-recognized modification of improving basic material characteristics. Radiation, which penetrated through specimens and reacted with the cross-linking agent, gradually formed cross-linking (3D net), first in the surface layer and then in the total volume, which resulted in considerable changes in specimen behaviour. The specimens of 30% glass fiber filled PBT were made by injection moulding technology and irradiated by doses of beta radiation (0, 33, 66 and 99 kGy). The change of nano-mechanical properties is greatly manifested mainly in the surface layer of the modified PBT where a significant growth of nano-mechanical values can be observed. Indentation modulus increased from 1.1 to 1.8 GPa (increasing about 64%) and indentation hardness increased from 56 to 85 MPa (increasing about 52%).The results of the measurements showed considerable increase in nano-mechanical properties (indentation hardness, indentation elastic modulus, indentation creep) when beta radiation are used.

Recommended articles

LOGISTICS OF EXPERIMENTING WITH STRENGTHENING THE SURFACE LAYERS OF MACHINE PARTS

MILAN MAJERNIK, NAQIB DANESHJO
Keywords: logistics | experimenting | technological process | strengthening of the surface layers | roughness and hardness of the parts | modelling

INFLUENCE OF THERMAL MODIFIED PINEWOOD ON THE QUALITY OF MACHINING AT PLAIN MILLING

STEFAN BARCIK, VLADO GOGLIA, ANDREJ MAZAN, MAREK VANCO, LUBOMIR RAJKO
Keywords: flat milling | thermo-wood | quality of surface | cutting terms