Abstract

Heavy hydroaromatics from petroleum (HHAP) which has evident inhibiting ability toward deterioration of hydrocarbon oils was added to high density polyethylene (PE) and isotactic polypropylene (PP), and the additive effects were examined. After the confirmation of the prominent effects to thermal oxidation of PE and PP, the additive effects to radiation degradation were tested by γ-ray and electron beam irradiations in air. The addition of HHAP was obviously effective in radiation degradation, and the crosslinking of PE was distinctly suppressed by HHAP.

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