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首页> 外文期刊>Physica, B. Condensed Matter >Influence of titanium chloride addition on the optical and dielectric properties of PVA films
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Influence of titanium chloride addition on the optical and dielectric properties of PVA films

机译：氯化钛添加量对PVA薄膜光学和介电性能的影响

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Polymeric films based on polyvinyl alcohol (PVA) doped with titanium chloride (TiCl3) at different weight percent ratios were prepared using the solvent cast technique. The structural properties of these polymeric films are examined by XRD and FTIR studies. The complexation of the clopant with the polymer was confirmed by FTIR studies. The XRD pattern reveals that the amorphous domains of PVA polymer matrix increased with raising the TiCl3 content. The optical properties of these polymeric films were examined by optical absorption and emission spectroscopy. Electrical conductivity was measured at room temperature of pure PVA and PVA doped with different concentrations of TiCl3 from 20 Hz to 3 MHz. The conductivity was found to increase with the increase in clopant concentration. The dielectric constant (epsilon') indicates a strong dielectric dispersion in the studied frequency range and increases as clopant content increases. This increase in both sigma and epsilon' is attributed to the increase in the localized charges distribution. Moreover, a loss peak was identified in the dielectric loss spectra and it is attributed to the orientation of polar groups.
机译：使用溶剂流延技术制备基于聚乙烯醇（PVA）的聚合物膜，该聚合物膜以不同的重量百分比掺杂了氯化钛（TiCl3）。通过XRD和FTIR研究检查了这些聚合物薄膜的结构性能。 FTIR研究证实了螯合剂与聚合物的络合。 XRD图谱表明，随着TiCl3含量的增加，PVA聚合物基体的非晶域增加。这些聚合物膜的光学性质通过光学吸收和发射光谱法检查。在室温下测量纯PVA和掺杂了20 Hz至3 MHz不同浓度的TiCl3的PVA的电导率。发现电导率随凝结剂浓度的增加而增加。介电常数（ε'）表明在所研究的频率范围内介电色散很强，并且随着螯合剂含量的增加而增加。 σ和ε的增加归因于局部电荷分布的增加。此外，在介电损耗谱中确定了损耗峰，这归因于极性基团的取向。

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