Effect of UV and Gamma Radiation on the Mechanical and Degradation Properties of LLDPE-Clay Composites
Composites containing various amounts of LLDPE (Linear Low Density Polyethylene) and clay (0, 1, 5, 10, 20 and 30% of clay) were prepared using two different types of clay (Bijoypur white clay and China clay) by extrusion technique followed by compression molding. Tensile strength (TS) & tensile modulus (TM) of pure LLDPE were found to be 9.8 MPa & 175 MPa respectively. For both types of clay TS, Eb% was gradually decreased but TM was gradually increased with increasing the percentage of clay in LLDPE/clay composites. The effects of ionizing (gamma) and non-ionizing (UV) radiations on the mechanical properties of LLDPE/clay composites were studied. The composites irradiated under UV & gamma radiation showed higher TS than that of non-irradiated one. Thermal degradation of the composites was studied at different temperatures. Water uptake of the composites was found negligible.
Joong Hee Lee
M. A. Khan et al., "Effect of UV and Gamma Radiation on the Mechanical and Degradation Properties of LLDPE-Clay Composites", Advanced Materials Research, Vols. 123-125, pp. 415-418, 2010