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

Abstract

We herein report the preparation and properties of the first polymer blend using pyrene functionalized polyaniline (pf-PANI). The pf-PANI has been synthesized and its blend has been prepared with the copolymer of vinylidene fluoride and hexafluoropropylene P(VDF-HFP). The FTIR results reveal intermolecular interaction between the polar amide group of pf-PANI and the polarized CH 2 group of P(VDF-HFP). The crystalline phase of PVDF of the copolymer revealed a transformation from a to b crystalline form after blending with pf-PANI, as found from FTIR and XRD measurements. The calorimetric measurements together with DMA results revealed the blend is partially miscible. The SEM measurements showed that the pf-PANI has been dispersed uniformly in the P(VDF-HFP) matrix. The solution photoluminescence spectrum of the pf-PANI exhibited emission in the purple-blue region and is slightly red shifted for the blend. The possible applications of this flexible fluorescent pf-PANI/P(VDF-HFP) has been suggested.

How to Install TEMPO in Dielectric Polymers—Their Rational Design toward Energy‐Storable Materials

“…One was assigned to orientation of ester groups with a broad peak in the mid‐frequency range, while the other was attributed to formation of microcapacitors originating from the short‐range charge hopping process between the radical sites separated by insulating PMMA segments. Such microcapacitors have been proposed for the polyaniline/poly(vinylidene fluoride) blend . Both ε′ and ε′′ of P(TMA‐ r ‐MMA) increased with temperature, which was ascribed to the lower activation energy for dipole orientation and charge hopping along the applied field.…”

“…Electroactive conducting organic polymers, such as polypyrrole, polyaniline, and polythiophenes, have been investigated as additives in insulating matrix polymers . Polyaniline is a promising conducting polymer additive for insulating polymers, such as poly(methyl methacrylate) (PMMA), poly(vinylidene fluoride), epoxy polymers, and polyurethanes, to form conducting additive/insulator blends and to tailor the electric and dielectric properties because of formation of a type of microcapacitor in the blend domain . However, the insolubility in organic solvents, low molecular weight, and poor processability of polyaniline limit the dielectric performance and availability in practical tests of capacitors .…”

“…Polyaniline is a promising conducting polymer additive for insulating polymers, such as poly(methyl methacrylate) (PMMA), poly(vinylidene fluoride), epoxy polymers, and polyurethanes, to form conducting additive/insulator blends and to tailor the electric and dielectric properties because of formation of a type of microcapacitor in the blend domain . However, the insolubility in organic solvents, low molecular weight, and poor processability of polyaniline limit the dielectric performance and availability in practical tests of capacitors . Alternative conducting organic candidates compatible with insulating polymers need to be explored to establish all‐organic dielectric materials.…”

Dielectric and conducting behavior of pyrene functionalized PANI/P(VDF‐co‐HFP) blend

“…Despite of good dielectric and conductivity properties of PANI/PVDF system, PANI is not compatible with PVDF and its copolymers . But, when functionalized protonic acids like DBSA are used as doping agents in PANI chains, it can form compatible blends with PVDF .…”

Poly(vinylidene fluoride-co-hexafluoropropylene)/polyaniline blends assisted by phosphonium – Based ionic liquid: Dielectric properties and β-phase formation

“…(a) without and (b) with 5 wt% of IL.The structural informations of the blends were obtained from XRD studies.Figure 3compares the XRD spectrum of pure PVDF-co-HFP with those corresponding to the PVDFco-HFP/PAni.DBSA blends without and with 5 wt% of IL. PVDF-co-HFP is a semicrystalline polymer and displays the main diffraction peaks at 2 = 17.6°, 18.3° and 19.9°, ascribed to the reflections (100), (020) and (110), respectively, corresponding to the α-crystalline phase of PVDF[41][42]. The addition of 10 wt% of PAni.DBSA does not exert influence on the XRD profile of the material.…”