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首页> 外文期刊>Journal of Applied Polymer Science >Filling effect on the structural, electrical, and magnetic properties of PVAc/Co composites
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Filling effect on the structural, electrical, and magnetic properties of PVAc/Co composites

机译：填充对PVAc / Co复合材料的结构，电和磁性能的影响

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摘要

Polyvinyl-acetate/-cobalt (PVAc/Co) composite films were prepared using a casting technique. The structural and physical properties were studied using X-ray diffraction (XRD), differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectroscopy, dielectric measurements, direct current magnetic susceptibility (π _(dc)), and electron spin resonance (ESR). The XRD patterns revealed that the incorporation of Co particles increases the amorphization of PVAc and Co oxide formations. The DSC results suggest that the thermal properties obviously improved. Frequency and filler concentration dependence of the dielectric constant (ε') and AC conductivity (σ _(AC)) were measured at room temperature in the frequency range 20 Hz to 3 MHz of pure PVAc and PVAc/Co composite films. The dielectric constant shows usual dielectric dispersion behavior. The dielectric constant and AC conductivity increased with the increase in Co content. The variation of σ AC is attributed to hopping of polarons and bipolarons in the composites. The filling level dependence of the effective magnetic moment (μ _(eff)) has been evaluated. The ESR spectra exhibit a peak of an increasing depth as Co content increases. The control of thermal stability, dielectric and magnetic moment of the composites films is interesting for applications such as electric and magnetic sensors.
机译：使用流延技术制备了醋酸乙烯酯/钴（PVAc / Co）复合膜。使用X射线衍射（XRD），差示扫描量热法（DSC），傅立叶变换红外（FTIR）光谱，介电测量，直流磁化率（π_（dc））和电子自旋共振研究了结构和物理性质（ESR）。 XRD图谱表明，Co颗粒的掺入增加了PVAc和Co氧化物形成的非晶化。 DSC结果表明热性能明显改善。在室温下，在纯PVAc和PVAc / Co复合薄膜的20 Hz至3 MHz的频率范围内，测量介电常数（ε'）和AC电导率（σ_（AC））对频率和填料浓度的依赖性。介电常数显示出通常的介电色散行为。随着Co含量的增加，介电常数和AC电导率增加。 σAC的变化归因于复合材料中极化子和双极化子的跳跃。有效磁矩（μ_（eff））的填充水平依赖性已得到评估。当Co含量增加时，ESR光谱显示出深度增加的峰。复合膜的热稳定性，介电和磁矩的控制对于诸如电和磁传感器的应用是令人感兴趣的。

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