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利用介电谐振谱分析了聚丙烯蜂窝状原生膜 (PPCellular,PQ5 0型 )的力学及介电参数 ,测得其压电系数d33约为 18pC N .经合理的压力膨化工艺处理后 ,其d33可增加至 36 7pC N ,比久负盛名的铁电聚合物聚偏氟乙烯 (PVDF)的d33高 2 0倍以上 ,也高于压电陶瓷锆钛酸铅 (PZT)的相应值 .结合扫描电镜照片及根据PP蜂窝膜压电理论模型分析了这类空间电荷型非极性孔洞薄膜驻极体呈现高压电系数的结构和物理根源
The mechanical and dielectric parameters of PPC cellular (PPC5 0) were analyzed by dielectric resonance spectroscopy. The piezoelectric coefficient d33 was about 18 pC N. After reasonable pressure puffing process, the d33 Can be increased to 36 7pC N, which is more than 20 times higher than the d33 of the prestigious ferroelectric polymer PVDF and also higher than the corresponding value of the piezoelectric ceramic lead zirconate titanate (PZT) And according to the PP honeycomb membrane piezoelectric theoretical model, the structure and physical origin of high-voltage coefficient of the space charge-type non-polar hole film electret were analyzed