本文研究了聚偏氟乙烯的压电性。聚偏氟乙烯薄膜是用DMA溶剂浇铸而成,然后进行单轴拉伸,并采用热驻极的方法使薄膜成极。实验结果表明,压电活性依赖于拉伸比、极化电场、极化温度和极化时间。此外,还研究了聚偏氟乙烯压电薄膜的稳定性和某些使用特性。 This paper studies the piezoelectricity of polyvinylidene fluoride. Polyvinylidene fluoride film is cast with a DMA solvent, and then uniaxially stretched, and the use of thermal electret method to make the film pole. The experimental results show that the piezoelectric activity depends on the stretching ratio, the polarization electric field, the polarization temperature and the polarization time. In addition, the stability of polyvinylidene fluoride piezoelectric film and some use characteristics were also studied.