Irradiation Compatibilization Of High Density Polyethylene / Inorganic Particle Filled System

Through y-ray and electron beam irradiation, some oxygen containing groups can be introduced onto the molecular chain of HDPE to increase the affinity of HDPE and inorganic fillers. When an optimized compatibilzer is used, the affinity between irradiated HDPE and fillers could be further improved. The effects of the compatibilizer and the particle size of fillers on the mechanical properties of irradiated HDPE/inorganic fillers were studied. Ultrasonic was adopted to improved the dispersion of inorganic fillers in HDPE. Anti-aging property of irradiated HDPE/STC was investigated as well.1. The y-ray irradiation could be a effective way to improve the affinity of HDPE/muscovite blend. In case a bifunctional -NHa containing compatiblizer is utilized, the affinity could be further improved. Both stiffness and toughness of the blend can be increased greatly. The particle size of muscovite has a notable effect on the mechanical properties of the y-HDPE/muscovite blend. A thorough study shows that, compared with HDPE, the yield and notched Izod impact strength of Y -HDPE/muscovite (60/40, 3 u m) are increased to 32.8 MPa and 388 J/m from 24.2 MPa and 210 J/m respectively.2. The dispersion of inorganic fillers in HDPE could be better after ultrasonic pre-treating. And better mechanical properties could be achieved. The optimum ultrasonic pre-treating time is 20 min, the optimum ultrasonic power is 200 W.3. The e-HDPE/STC blend has good anti-aging properties. After heat ageing for 168 hours, the mechanical properties of e-6098/STC almost have no change. It is also found that the impact strength and break-elongation of the blend will decrease when it is exposed to u.v. light. A further research is needed to be conducted to improve the material's anti-photo-oxidation properties.