Abstract Polyvinyl Vinyl Chloride (PVC) multiwall carbon nanotubes (MWCNTs) nanocomposite flexible films were prepared using the solvent blend technique. Chloroform (CHCl3) and tetrahydrofuran ((CH2)4O) were used as solvents for MWCNTs and PVC, respectively. The effect of the solvents’ blend on electrical, optical and thermal properties of PVC/MWCNTs were investigated. The results of the Raman spectrum showed that all the characteristic bands of PVC polymer have a slight shift due to addition of MWCNTs. Electrical results showed that the nanocomposite samples with chloroform volume ratios of 10% and 25% had nearly the same conductivity. This is attributed to the formation of the MWCNTs network, which assisted in electrical conductivity. The I-V hysteresis curve decreases as the temperature increases and as it approaches the glass transition temperature. The non-isothermal kinetics analysis for PVC and PVC/MWCNTs were investigated by Thermogravimetry Analysis (TGA) using the model-free kinetic method. The non-isothermal measurements were carried out at five heating rates of 5 to 40∘C/min. The results show that the main decomposition process has constant apparent activation energies for all samples. The use of the bi-solvent method has improved the dispersion of untreated MWCNTs, and this has been reflected on the stability of both electrical and thermal properties.

中文翻译：

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PVC/MWCNTs 纳米复合材料的表征：溶剂混合物

摘要 采用溶剂共混技术制备了聚氯乙烯（PVC）多壁碳纳米管（MWCNTs）纳米复合柔性薄膜。氯仿 (CHCl3) 和四氢呋喃 ((CH2)4O) 分别用作 MWCNT 和 PVC 的溶剂。研究了溶剂共混物对 PVC/MWCNTs 的电学、光学和热学性能的影响。拉曼光谱的结果表明，由于加入了多壁碳纳米管，PVC聚合物的所有特征带都有轻微的偏移。电学结果表明，氯仿体积比为 10% 和 25% 的纳米复合材料样品具有几乎相同的电导率。这归因于有助于导电性的 MWCNT 网络的形成。IV 滞后曲线随着温度升高和接近玻璃化转变温度而降低。使用无模型动力学方法通过热重分析 (TGA) 研究了 PVC 和 PVC/MWCNT 的非等温动力学分析。非等温测量在 5 到 40∘C/min 的五个加热速率下进行。结果表明，所有样品的主要分解过程具有恒定的表观活化能。双溶剂法的使用改善了未处理多壁碳纳米管的分散性，这反映在电学和热学性能的稳定性上。非等温测量在 5 到 40∘C/min 的五个加热速率下进行。结果表明，所有样品的主要分解过程具有恒定的表观活化能。双溶剂法的使用改善了未处理多壁碳纳米管的分散性，这反映在电学和热学性能的稳定性上。非等温测量在 5 到 40∘C/min 的五个加热速率下进行。结果表明，所有样品的主要分解过程具有恒定的表观活化能。双溶剂法的使用改善了未处理多壁碳纳米管的分散性，这反映在电学和热学性能的稳定性上。