Interfacial conditions and space charge in PE laminates

Heterocharge develops in the polyethylene of MI=6 while homocharge developes in the polyethylene of MI=24. The negative interfacial charge was observed in both PE1 laminates and PE2 laminates. This interfacial charge decreases as the laminating temperature increases and finally becomes unclear. Silicone oil enhances the formation of interfacial charge whereas the chemicals such as acetophenone and 4-ethylnitrobenzenes decreases the interfacial charge. Therefore, it is expected that the change in interfacial conditions leads to a modification of interfacial charge and thus the space charge in the system containing the interfaces