PVDF

在这项研究中，我们尝试通过溶剂浇铸法制备聚偏二氟乙烯（PVDF）和聚乳酸（PLA）的二元聚合物共混物。PVDF和PLA均具有良好的压电特性，被认为是用于能量存储和能量收集应用的。将PVDF-PLA共混物以1-3的拉伸比单轴拉伸以改变结构和介电性能。光谱学研究，例如；傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）分析证实了PVDF电活性极性相的改善，从而揭示了PVDF的CH 2和CF 2基团之间的成功分子间相互作用，并且-C = O或-OH或-CH 3的PLA基团导致两种聚合物之间的良好相容性。阻抗specroscopy测定确认未拉伸（ε的增强dielctric行为“= 10.5和黄褐色δ  = 0.001）以及机械拉伸共混物（ε” = 14.4和黄褐色δ  = 0.001），其在它们的界面归因于较小的球晶的形成最终促进了它们的界面极化。

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In this study, we attempted to prepare a binary polymer blend of poly (vinylidene fluoride) (PVDF) and poly lactic acid (PLA) by employing solvent casting method. Both PVDF and PLA possessing good piezoelectric properties, are considered for energy storage and energy harvesting applications. PVDF-PLA blends were uniaxially stretched at stretch ratios 1–3 to modify the structural and dielectric properties. Spectroscopic studies such as; Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis confirmed the improvement in electroactive polar phases of PVDF thus revealing the successful intermolecular interaction between CH2 and CF2 group of PVDF and -C = O or −OH or −CH3 group of PLA leading to good compatibility between both the polymers. Impedance specroscopy measurement confirmed the enhanced dielctric behaviour of unstretched (ε’ = 10.5 and tan δ = 0.001) as well as mechanically stretched blend (ε’ = 14.4 and tan δ = 0.001) which is ascribed to the formation of smaller spherulites at their interface which eventually facilitated their interfacial polarisation.