Synthesis of highly branched conducting polymer architecture for electrochromic applications

Soganci, Tugba; Gumusay, Ogun; Söyleyici, Hakan Can; Ak, Metin

doi:10.1016/j.polymer.2017.11.067

Cited by 47 publications

(22 citation statements)

References 51 publications

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“…Current research gains much attention on conducting polymers in order to overcome the traditional role of polymers as insulating materials. Variety of new technologies from various disciplines has been focused on conducting polymers and their blend nanocomposites . The blending of conducting polymers enables the combination of desired properties exhibited individually by component polymers.…”

Section: Introductionmentioning

confidence: 99%

Influence of titanium dioxide nanoparticles on the structural, thermal, electrical properties, and gas sensing behavior of polyaniline/phenothiazine blend nanocomposites

2019

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We report the preparation, characterization, and properties of polyaniline (PANI)/ phenothiazine (PTZ) blend with different concentration of titanium dioxide (TiO 2 ) nanoparticles. Formation of nanocomposites was monitored by Fourier transform infrared spectra, UV, X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), differential scanning calorimetry (DSC), and thermogravimetric analysis studies. Spectroscopic characterization confirmed the bonding structure of PANI/PTZ/TiO 2 composite through the shift in absorption peaks of nanocomposites compared to pure PANI/PTZ blend. XRD studies confirmed the presence of sharp crystalline peaks of TiO 2 in the blend system signifying good interaction among the adjoining molecular chain of polymer with the nanoparticles. Surface morphological details of the nanocomposites obtained using SEM and HR-TEM reveal the formation of hemispherical-like structures with a diameter of 15 to 30 nm. DSC measurements of these nanocomposites showed that the glass transition temperature was reduced as the concentration of TiO 2 increased into PANI/PTZ blend matrix. The influence of filler loading on thermal stability showed that the TiO 2 enhanced the thermal stability and reduced the rate of thermal degradation of polymer blend nanocomposites. Conductivity studies showed that both AC and DC conductivity, dielectric constant, and dielectric loss increase with an increase in the concentration of nano-filler TiO 2 up to 10 wt%. Similarly, the ammonia gas sensing behavior of nanocomposites was also improved by the addition of nanoparticles. From the characterization studies, it can be suggested that TiO 2 helps to achieve excellent thermophysical properties, gas sensing, electrical conductivity, and dielectric characteristics for PANI/ PTZ blend which can be used in the fabrication of electrical or nano-electronic devices.

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Section: Introductionmentioning

confidence: 99%

Influence of titanium dioxide nanoparticles on the structural, thermal, electrical properties, and gas sensing behavior of polyaniline/phenothiazine blend nanocomposites

2019

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“…With the addition of current consumption, the coloration efficiency of these polymers are calculated to be 47 cm 2 /C (ECPA), 66 cm 2 /C (ECPA-TA), 53 cm 2 /C (ECPA-POSS), and 57 cm 2 /C (ECPA-F), respectively. Although the resulting coloration efficiency values are quite low compared to recent results from conjugated electrochromic polymers [4,24,25], the prepared polymer are still qualified as electrochromic material in the applications of light-adapting mirrors and smart windows. In addition, the switching speeds of the polymers are also determined from Figure 5b.…”

Section: Electrochromic Performancementioning

confidence: 76%

Oligoaniline-containing electrochromic polymers with tunable properties

Li¹,

Jia²,

Zhou³

et al. 2018

Express Polym. Lett.

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Abstract. Electrochromic polymers have attracted much attention due to their potential applications in displays, smart windows, intelligent mirrors, and wearable devices. Here, a novel polyamic acid containing aniline pentamer with improved electrochromic properties and new functionalities was synthesized via oxidative coupling polymerization, followed by postpolymerization of tetraaniline, polyhedral oligomeric silsesquioxane, and fluorene, respectively. With the introduction of tetraaniline pendants, the resultant polymer exhibits improved electrochromic performance with high optical contrast value and rapid switching rate, because of the high content of electrochromic units in the polymeric structure. The polyamic acid functionalized with polyhedral oligomeric silsesquioxane, demonstrates a great enhancement of switching rate in the electrochromism, due to the rapid electrolyte migration through polymer film under electrochemical potentials. In addition, a new electrofluorochromic feature is easily achieved through the introduction of fluorescent fluorene groups into the polymeric architecture.

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“…Branched polymers have become of special interest because of their globular structure and particular properties, such as low solution and melt viscosities, improved solubilities, and higher functional group density, compared to their linear analogs . Thus, branched polymers have a wide range of potential applications, like rheological modifiers, nanotechnology, biomaterials, and so on . The preparation of branched polymers via self‐condensing vinyl polymerization (SCVP) of inimers, which contains both a potential initiating site and a vinyl group, was firstly reported by Frechet in 1995 .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Thus, branched polymers have a wide range of potential applications, like rheological modifiers, nanotechnology, biomaterials, and so on. [4][5][6][7] The preparation of branched polymers via self-condensing vinyl polymerization (SCVP) of inimers, which contains both a potential initiating site and a vinyl group, was firstly reported by Frechet in 1995. 8 A series of branched vinyl polymers have been prepared using this strategy.…”

mentioning

confidence: 99%

Radical polymerization in the presence of peroxide and reducing agent monomer for branched polymers

Jiang

Huang

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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In this article, we report the radical polymerization in the presence of peroxide and commercially available or designed reducing agent monomer (RAM) for the preparation of branched poly(methyl methacrylate)s (PMMAs). The reaction behavior of the RAM was studied by NMR. Triple‐detection SEC (TD‐SEC) analysis was used to confirm the branching structure of the prepared PMMAs and to investigate the influence of peroxide concentration and RAM concentration on molecular weight and branched structure. The obtained branched PMMAs exhibited high molecular weights and relatively narrow polydispersities at high conversion of MMA. Interestingly, a significant increase in molecular weight and degree of branching of the obtained polymers are observed in higher BPO concentration, these results are quite different from that reported in the literature. The unique radical polymerization mechanism in the RAM/BPO redox‐initiated radical polymerization system resulted in branched PMMAs with high molecular weights at relatively high RAM and BPO concentrations. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 833–840

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Synthesis of highly branched conducting polymer architecture for electrochromic applications

Cited by 47 publications

References 51 publications

Influence of titanium dioxide nanoparticles on the structural, thermal, electrical properties, and gas sensing behavior of polyaniline/phenothiazine blend nanocomposites

Influence of titanium dioxide nanoparticles on the structural, thermal, electrical properties, and gas sensing behavior of polyaniline/phenothiazine blend nanocomposites

Oligoaniline-containing electrochromic polymers with tunable properties

Radical polymerization in the presence of peroxide and reducing agent monomer for branched polymers

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