The environmental stability

including ageing behaviors and anti-ageing

of polymers is an important basic science topic and has become a research hotspot in recent years. This paper introduced the processes and mechanisms of thermal oxidation ageing and photo-oxidation ageing of polymers. The characterization methods and the anti-ageing additives were introduced too. Nanoparticles

such as nano-silica

nano-titanium dioxide and nano-zinc oxide

are today considered new-generation anti-ageing agents with enhanced performance. Some achievements obtained by us in the field were reviewed here.