Physical properties of polyethylene:
1. Polyethylene has excellent chemical stability and can resist the corrosion of hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, amines, sodium hydroxide, potassium hydroxide and other chemicals at room temperature, but nitric acid and sulfuric acid have strong destructive effects on polyethylene;
2. Polyethylene is prone to photooxidation, thermal oxidation and ozone decomposition, and is easily degraded under the action of ultraviolet rays. Carbon black has a good shading effect on polyethylene. After irradiation, crosslinking, chain breakage and the formation of unsaturated groups will occur.