【摘要】 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更多还原

【Abstract】 In this paper,mechanical and dielectric parameters of virgin PP cellular film(type PQ50) were analyzed by dielectric resonance spectroscopy,and piezoelectric d \{33\} coefficient of 18pC/N was measured. Up to 367pC/N of piezoelectric d 33 coefficient for PP cellular electret was performed by means of pressure-expansion techniques under the reasonable treatment conditions,which is about 20 times higher than that of famous ferroelectric polymer β-PVDF and which is higher than that of piezoelectric ceramic PZT. Based on scanning electron micrograph and according to the piezoelectric theory model for PP cellular film the structural and physical sources for high piezoelectric coefficient of these kinds of nonpolar porous film electret with space charge were discussed.更多还原