| Abstract: | Compared with ultraviolet irradiation in air, high density polyethylene (HDPE) could be very quickly functionalized by ultraviolet irradiation in ozone atmosphere, introducing oxygen-containing groups such as C=O and C-O onto the molecular chains of HDPE. After ultraviolet irradiation in ozone atmosphere, the molecular weight of HDPE decreased, its distribution became wider, the melt index (MI) increased, and the water contact angle decreased. After irradiating for a short time in ozone atmosphere, the interfacial interaction between the irradiated HDPE and sericite-tridymite-cristobalite (STC) particles is improved. The yield and notched impact strength of the HDPE/STC (60/40) blend with 10 min-irradiated HDPE are increased from 25.5 MPa and 61 J/m for the nonirradiated HDPE/STC (60/40) blend to 30.2 MPa and 360 J/m for the irradiated blend, respectively. |
