Abstract
We report on the miscibility and phase behaviour of polypyrrole-polyaniline (PPy/PANI) as a function of blend composition. The PPy/PANI blends were prepared by solution processing method, using dimethyl sulfoxide (DMSO) solvent. Characterization of the polymer blends was carried out based on the data analysis from Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and differential scanning calorimetry (DSC). The PPy/PANI system was successfully formed blends in DMSO solvent. The polymer blends showed almost amorphous nature in XRD spectra because of intermolecular interaction between PPy and PANI macromolecules, which was confirmed by FT-IR data. Specifically, the DSC result for the PPY : PANI = 50 : 50 wt.% blend showed only one glass transition temperature (Tg), which indicates that the two polymers are well miscible without undergoing any phase separation.
Highlights
Polymer blends have attracted many scientists to devote their lives to study the polymer-polymer system in order to develop new functional plastics with technologically attractive properties [1]
The Fourier transform infrared spectroscopy (FT-IR) spectra showed that there is the change of intermolecular interactions between PPy and PANI with composition, resulting in the change of spectral shape
We notice that the speci c interactions between PPy and PANI macromolecule were con rmed by the change of intensity and shape observed in the range of spectra at 1645–1130 cm−1 for the samples of PANI, PPy, and PPy : PANI 50 : 50, and by the peak shift observed around the spectra at 980–786 cm−1
Summary
Polymer blends have attracted many scientists to devote their lives to study the polymer-polymer system in order to develop new functional plastics with technologically attractive properties [1]. Conjugated polymers showing metallic or semiconducting properties have been commonly synthesized through electrochemical and chemical oxidative polymerization [3]. Between these two methods, the former electrochemical methods produce a film with brittle and not processable property [4]. The former electrochemical methods produce a film with brittle and not processable property [4] The latter method, that is, chemical oxidative polymerization provides a better opportunity for producing significantly a solution processable polymer, compared to the electrochemical methods. Us, many efforts have been made to further improve the processability by preparing soluble conducting polymer through chemical oxidative method, for example, grafting alky side chains to polymeric backbone, and so on. The blending of PANI with polypyrrole (PPy) has enhanced the performance of materials, based on improved mechanical, thermal, electrical, and other processing properties [8]. e recent approaches for preparing polymer semiconductors are through solution processing methods. is method is advantageous from various points of view, such as cost minimization, scale-up, and roll-to-roll
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