An experimental study was carried out to investigate the effects of isopropoxy tri(dioctyl pyrophosphoryl) titanatecoupling agent on the mechanical performance

rheological property and microstructures of polyethylene highly loaded withaluminum hydroxide (Al(OH)3) composite. It was found that the addition of coupling agent results in reduced tensile strengthand increased percentage elongation of the filled systems. Silane crosslinkable polyethylene substituting for polyethylene as matrix improves the tensile strngth of the composite

while the percentage elongation of the composite still remains at a desired level.Melt viscosity of the composite will be improved by addition of titanate coupling agent.Microstructures of the composites were also studied by means of the scanning electron microscopy(SEM) technique.SEM micrographs reveal that finer dispersion of Al(OH)3 will be obtained upon treatment of titanate and a transition from brittle to tough fracture takes place before and after silane crosslinking structure is introduced into polyethylene highly filled with Al(OH)3 composite.