本文研究了聚偏氟乙烯(PVDF)的介电、动态力学,热刺激电流和压电性能。在—150℃—120℃范围均观察到四个松弛转变过程,并阐述了它们的机制。 在室温以上,观察到二个松弛峰,与大部分报道不同,而与Kakutani的结果一致,本文还观察到d′_(31)与ε′_3成线性关系,高温下的斜率大于低温的斜率,可能是二种极化机构所致,压电效应的起源与偶极子取向有关。 In this paper, the dielectric, dynamic mechanics, thermal stimulation current and piezoelectric properties of polyvinylidene fluoride (PVDF) were studied. Four relaxation transitions were observed in the range of -150 ℃ -120 ℃, and their mechanism was expounded. Above room temperature, two relaxation peaks were observed, which were different from most reports. In agreement with Kakutani’s results, we also observed a linear relationship between d ’_ (31) and ε’_3, with the slope at high temperature being greater than the slope at low temperature , May be caused by two kinds of polarization mechanism, the origin of the piezoelectric effect and the dipole orientation.