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聚萘二甲酸乙二酯(Poly(ethylene naphthalene-2,6-dicarboxylate),PEN)是和聚对苯二甲酸乙二酯(poly(ethylene terephthalate),PET)结构类似的芳香族聚酯.通过在不同的储存条件下(包括不同的环境温度和相对湿度)的表面电位衰减测量、开路热刺激放电(thermally stimulated discharge,TSD)电流谱和电荷TSD谱的分析,研究了电晕充电后PEN薄膜驻极体的空间电荷储存及其稳定性,并对PEN和PET薄膜驻极体的电荷稳定性做了对比性的研究.结果说明,在各种不同的储存条件下,PEN薄膜驻极体的电荷储存稳定性均明显优于PET.利用等温退极化程序,已估算出正负电晕充电的PEN薄膜驻极体的空间电荷储存寿命(有效时间常数)τ约为90a.由于PEN薄膜驻极体的优异电、机械和热性能,研究的结果为将其用作为新型振膜式驻极体声传感器的芯片材料提供了理论和技术支持.
Poly (ethylene naphthalene-2,6-dicarboxylate) (PEN) is an aromatic polyester of similar structure to poly (ethylene terephthalate) (PET) The surface potential decay measurement, the thermally stimulated discharge (TSD) current spectrum and the charge TSD spectra under different storage conditions (including different ambient temperature and relative humidity) were studied. The effects of corona-charged PEN film The charge storage and stability of the electret in space were studied, and the charge stability of PEN and PET thin film electrets was compared. The results show that under different storage conditions, the PEN thin film electret The storage stability of charge storage is obviously better than that of PET. The space charge storage lifetime (effective time constant) τ of PEN thin film electrets with positive and negative corona charge has been estimated to be about 90a by isothermal depolarization procedure. The excellent electrical, mechanical and thermal properties of the polar body, the results of the study provide theoretical and technical support for its use as a chip material for a novel diaphragm-type electret acoustic sensor.