Characterization of Chemically Synthesized Polyaniline-Polyvinylchloride-Montmorillonite Nanocomposite

Arefeh Tabatabaei, Maryam Farbodi
Iranian Journal of Polymer Science and Technology   unpublished
polyaniline, PVC, montmorillonite, nanocomposite, mechanical properties P olyaniline-montmorillonite (PANI-MMT) nanocomposite was synthesized by chemical polymerization of aniline in the presence of montmorillonite (MMT) nanostructures. The triple hybrid of polyaniline-polyvinylchloride-montmorillonite (PANI-PVC-MMT) was prepared by mixing of the synthesized PANI-MMT nanocomposite with a solution of polyvinylchloride (PVC) in tetrahydrofurane (THF). In addition, PANI-PVC composite was prepared
more » ... y mixing of pure synthesized PANI and PVC solution in THF. To investigate the mechanical properties, the PANI-PVC composite and PANI-PVC-MMT nanocomposite films were prepared with 5, 10 and 15 wt% of pure PANI and PANI-MMT nanocomposite, respectively. The results showed that the PANI-PVC-MMT nanocomposite film having 10 wt% of PANI-MMT nanocomposite displayed the best mechanical properties. Therefore, it was chosen as optimum film and its physico-chemical properties were characterized. The cyclic voltammetry (CV) technique confirmed that the triple hybrid of PANI-PVC-MMT nanocomposite was electroactive. Also, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) techniques were used to characterize the composition and structure of the PANI-PVC-MMT triple hybrid nanocomposite. X-Ray diffraction (XRD) technique showed an intercalated structure for the PANI-PVC-MMT nanocomposite. The thermal stability improvement of the PANI-PVC-MMT nanocomposite in comparison with the pure PVC was established by thermogravimetric analysis (TGA).