| 초록 |
Flame retardants such as aluminum hydroxide(Al(OH)3, ATH) and magnesium hydroxide (Mg(OH)2, MDH) are widely used to improve the flame retardation and suppress the smoke density in polyolefin blends. While many researches have been performed about the effect of these metal hydrates(ATH or MDH) on the flame retardancy, few reported about the processability. In this study, the effect of metal hydrates on the EVA/LLDPE extrusion was investigated. Various kinds of metal hydrates, different particle sizes, with/without surface coating by stearic acid, and levels were used and the processability was compared. Processability was measured by the onset of extrudate melt fracture. The level of metal hydrate has greatly influenced the processability. Also, the effects of surface coating, particle size, and content of metal hydrates on the rheological and mechanical properties were evaluated as well as flame retardancy. |
