AgNWs/γ-ZrP改性PEN复合材料的阻燃效果与电学特性研究OA

In the study,polyethylene naphthalate(PEN)was employed as the matrix,and γ-zirconium phosphate(γ-ZrP)combined with silver nanowires(AgNWs)were introduced to construct hybrid fillers.AgNWs@γ-ZrP modified PEN composites were subsequently prepared,and their thermal stability,electrical properties,and flame retardant behavior were evaluated.The results indicated that γ-ZrP was uniformly dispersed in the matrix,while AgNWs formed a continuous conductive network.Compared with neat PEN,the thermal stability of the composites was significantly enhanced.For PEN/15%-AgNWs@ZrP,the initial decomposition temperature increased from 415.7℃to 446.2℃,the maximum decomposition temperature rose from 432℃to 461.6℃,and the char residue at 700℃improved from 70.23%to 74.76%.The mechanical strength of PEN/15%-AgNWs@ZrP was also simultaneously improved,with the flexural strength and tensile strength increasing by 24.26%and 43.89%,respectively.As the AgNWs content increased,the electrical conductivity rose from 8.05×10-10 S/cm to 39.02×10-10 S/cm,and the total shielding effectiveness reached a maximum of 60.75 dB.For PEN/15%-AgNWs@ZrP,the peak heat release rate(PHRR)decreased from 433.9 kW/m2 to 278.3 kW/m2,the total heat release(THR)dropped from 116.67 MJ/m2 to 74.27 MJ/m2,the limiting oxygen index increased to 22.8%,and a UL-94 V-0 rating was achieved.AgNWs@γ-ZrP could synergistically enhance the thermal stability,flame retardancy,and electromagnetic interference shielding performance of PEN.