PMMA-PVAc共混物的热激放电电流研究

R. Sekar, A. Tripathi, T. C. Goel, P. Pillai
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引用次数: 2

摘要

对聚甲基丙烯酸甲酯(PMMA)和聚醋酸乙烯酯(PVAc)共混物进行了热刺激放电电流(TSDC)研究。温度和场的变化对TSDC峰的影响表明,共混物中的极化是由于电荷载流子被困在深阱中导致诱导偶极子的形成。在重量比为50:50和90:10的PMMA-PVAc共混物中,没有观察到个别材料的极性峰。结果表明,在共混物中,聚合物链纠缠在一起,偶极对总极化的贡献几乎可以忽略不计。本文还报道了介质弛豫参数。
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"Thermally stimulated discharge current studies on PMMA-PVAc blends"
Thermally Stimulated Discharge Current (TSDC) studies have been carried out on PolyMethylmethacrylate (PMMA) and Poly Vinyl Acetate (PVAc) blends. The effect of temperature and field variation on TSDC peaks indicate that the polarization in the blend is due to the charge carrier trapping in the deep traps which leads to the induced dipole formation. No polar peak of individual materials has been observed in the 50:50 as well as 90:10 by weight ratio of PMMA-PVAc blend. It is concluded that in the blend the polymer chains are so entangled that the dipolar contribution in the total polarization becomes almost negligible. The dielectric relaxation parameters are also reported.
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