Preparation of SiC/LDPE nanocomposites surface modified by KH-560 and its space charge property

The space charge distribution of the polymer is an important factor affecting the insulating properties. This paper studies the characteristics of space charge distribution of SiC/LDPE nanocomposites surface modified by the coupling agent KH-560. The experimental results show that the interface between the nano-SiC particles and polyethylene itself is the main source of the trap, and add different nano-particles have different implications on space charge distribution of nanocomposites, and there is a certain inhibition of the charge injection of the same polarity. It can be analyzed that the coupling agent has important implications on the nature and level of the traps, because of the coupling agent KH-560 molecule containing asymmetric side chain and terminal group structure which prone to deep traps with negative polarity tendency. The modified SiC/LDPE nanocomposites have good suppression effect of space charge injection and its migration, which helps enhancing the electrical properties of LDPE.