Thermal and mechanical properties of PVDF/PANI blends

Abstract

Poly(vinylidene fluoride)/polyaniline blends of different composition were synthesized by chemical polymerization of aniline in a mixture of Poly(vinylidene fluoride) and N,N-dimethylformamide and their thermal and mechanical behavior was investigated as a function of the polyaniline doping level and the composition using thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis and tensile tests techniques. The results showed the blend obtained presents a good thermal stability with low weight loss up to 300 °C, assigned to water and solvents evaporation. The glass transition and melting point is not affected by the PANI content in the blend, showing that polymers are no miscible. The films produced present a good sustainability; however the presence of the conducting polymer in the blend increases the tensile strength and the Young modulus, while diminishes the elongation at break, as compared to pure PVDF.

Microstructure and properties of novel fluorescent pyrene functionalized PANI/P(VDF‐HFP) blend

“…At low temperature region (−40°C to −100°C), the blend exhibits a storage modulus E ' (7.6 GPa) almost comparable with the virgin PVH (8.8 Gpa). This E ' value for PVH is in close agreement with the E ' value of PVDF reported at −80°C . Upon heating, the storage modulus for virgin PVH starts to decrease steadily at ca.…”

“…Upon cooling, higher crystallization temperature is found for the blend (96°C) as compared with PVH (92°C), which suggests that the pf‐PANI chains acts as a nucleating agent for PVH crystallization [Figure (B)]. This result is completely in contradiction to the results reported for PANI/PVDF blend, where the authors did not observe any change in T g and T m for the blend in comparison with their reference counterparts suggesting their incompatibility …”

Synthesis and characterization of conductive, biodegradable, elastomeric polyurethanes for biomedical applications

“…This limits the mobility of CPU polymer chains, which reduces the elasticity of doped CPU films while increasing their initial moduli. Furthermore, the doped polyaniline showed higher crystalline at higher doping levels, which was confirmed by the XRD spectra of CPU and CPU1.5. Thus, it also reduced the elasticity of the doped CPU films compared with the undoped CPU film.…”

Controlling the morphology of polyaniline–platinum nanocomposites using swollen liquid crystal templates

“…Mass loss for B-PANI below 150 C is due to the loss of water. Loss of bonded water, dopant ions and oligomers causes mass loss in the temperature range of 150-400 C. Finally, degradation of polymer chain takes place above 400 C. [44][45][46]. Interestingly, the thermal decomposition pattern of the PANI-Pt nanocomposites was entirely different from the bulk-PANI.…”