Effect of maleic anhydride on trap levels of alumina/low-density polyethylene by photo-stimulated discharge

ABSTRACT

In this paper, the distribution of trap levels of alumina/polyethylene (Al₂O₃/LDPE) modified by maleic anhydride (MAH) was studied by photo-stimulated discharge (PSD). The PSD results show that the energy level of charge traps in the 0.5% and 1% Al₂O₃/LDPE modified by MAH is mainly distributed in 4.68–5.64 eV, and the trap density maximum is at 235 nm and 230 nm, respectively. According to the experimental result, the maleic anhydride can provide pure polyethylene with abundant deep traps. However, it can effectively reduce trap density of the Al₂O₃/LDPE system, especially, this kind of mechanism of action is more obvious for the 1%-doped Al₂O₃/LDPE system.

KEYWORDS:

• Photo-stimulated discharge
• maleic anhydride
• nanoparticles
• trap levels

Additional information

Funding

We would like to express sincere gratitude to all the colleagues in our project group. We gratefully acknowledge the financial support by the National Science Foundation (NSF) (51541702), Innovative Foundation of Harbin under Contract No. 2016RQXXJ052, and the Natural Science Foundation of Heilongjiang Province (Nos. QC2015063 and QC2013C042).