Study On PE/Grphite Conductive Composites

In recent years,more and more attentions were paid to the conductive polymer materials with the rapid development of the electron technology. And the conductive composites are light,cheap and easy to shape.They can adjust their conductive property and mechanical property based on need.They are mass production.So studying conductive composites is becoming the hot topic.Using the solution intercalation in the nano-composite to produce the lower percolation threshold conductive composite composed of conductive filler with flake structure attracts a lot of people.From this view,this paper had been finished. We select polyethelyne as fundamental resin,natural scale graphite,expanded graphite by self-made,expanded graphite as conductive fillers to synthesize conductive composite through different techniques of compound mixing.The effects of the conductive composites of different conductive fillers and the different dosage of conductive fillers,different technology and the different dosage of compatibilizer(MAH grafted PE) were studied respectively.The results showed that the conductive composites including expanded graphite filler have the best conductive property when they were produced with the same processing.And the solution intercalation is the best methold to produce the lowest percolation threshold conductive composites when a type of conductive filler was used.Because of the flam-retardant property of the graphite,we also studied the composites' flammability. As the result, we found natural scale graphite .expanded graphite by self-made,expanded graphite all had a certain flam-retardant effect and the composite inclusive of expanded graphite had the best flam-retardant effect.