Characterization of poly(p-phenylene sulfide) polymers by thermally stimulated charging/discharging currents measurements

Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93) Pub Date : 1993-10-17 DOI:10.1109/CEIDP.1993.378984

M.-S.E. Wang, M. Campos, E. Forster

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引用次数: 3

Abstract

Five current peaks were observed in the thermally stimulated current (TSC) spectra of poly(p-phenylene sulfide) (PPS) films over the temperature range of 25 to 250/spl deg/C. At a heating rate of 2/spl deg/C/min, these peaks appeared at 43.5, 92, 121, 163, and 193/spl deg/C, respectively. Based on differential scanning calorimetry and literature data, the a peak at 43.5/spl deg/C and the b peak at 92/spl deg/C were attributed to the dielectric manifestation of sub-T/sub g/ and T/sub g/ transitions, respectively. The c peak at 121/spl deg/C was demonstrated to be caused by the crystallization of the amorphous part during the heating run. The d peak at 163/spl deg/C was likely associated with the slight crosslinking and/or chain extension of the polymers during the sample preparation. The e peak at 193/spl deg/C was attributed to the release of injected space charges trapped at the amorphous-crystal interfaces. A two-step molding method which greatly improved the PPS films' preparation was also developed.<>

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热刺激充电/放电电流测量法表征聚(对苯硫醚)聚合物

在25 ~ 250/spl℃范围内，聚苯硫醚(PPS)薄膜的热激电流(TSC)谱中观察到5个电流峰。在升温速率为2/spl℃/min时，这些峰值分别出现在43.5、92、121、163和193/spl℃。根据差示扫描量热法和文献数据，在43.5/spl°C处的a峰和92/spl°C处的b峰分别属于亚T/亚g/和T/亚g/跃迁的介电表现。在121/spl℃处的c峰是由非晶部分在加热过程中结晶引起的。在163/spl度/C处的d峰可能与样品制备过程中聚合物的轻微交联和/或链延伸有关。在193/spl度/C处的峰值归因于注入的空间电荷在非晶界面处的释放。开发了两步成型方法，大大提高了PPS薄膜的制备效果。

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Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93)

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