The triple-percolation structure spontaneously during the hot-compounding processing steps to form an PA coated GF and CB located at the surface of PP/PA interface and also within the coating PA.

• 四元PP/PA/GF/CB体系在熔融混合阶段自发形成PA包覆GF,炭黑沉积于PP/PA界面和PA相中的三重逾渗导电网络结构。