Storage Stability of Ultraviolet Irradiated Hdpe

The persistence of oxygen-containing groups such as C-O and C=O of ultraviolet irradiated high density polyethylene (HDPE) was investigated by FTIR, water contact angle measurement and measurements of the mechanical properties. The oxygen-containing groups of the irradiated HDPE after storage were still C=O and C-O, and the C=O concentration increased a little compared with that of the irradiated HDPE before storage. The water contact angle of the irradiated HDPE was unchanged after storage, so the hydrophilicity was constant. Compatibilised blends were prepared by using irradiated HDPE as a compatibiliser in HDPE/sericite-tridymite-cristobalite. The compatibilisation effect of the irradiated HDPE was better after storage.