English Abstract

The pursuit of Safety in Manufacture
Part V The Influence of Global Warming on Rubbers and Plastics
(I Influence of UV irradition, Heating and Moisture on Degradation of Polymers)

Yoshito OHTAKE
Chemicals Evaluation and Research Institute, Japan, Kitakatsushika-gun, Saitama, Japan
Nippon Gomu Kyokaishi,(2018),91(4),123-128 General Review in Japanese

The influence of increase in both environmental temperature due to global warming and ozone concentration caused by ultraviolet on polymers has been worried. PP homopolymer without antioxidant was subjected to accelerated weathering test. Degradation rate of PP was synergistically increased by combination of degradation factor, i.e. light, heat, and water. The degradation rate reached 6 times or more, based on carbonyl index.

Keywords: Degradation, Weathering Test, Ozone, Carbonyl Index