Miscibility of Poly(Vinyl Chloride) with Poly(Ethylene Oxide) of Different Molecular Weights

Stipanelov, Nataša

doi:10.15255/cabeq.2015.2290

Cited by 10 publications

(11 citation statements)

References 39 publications

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“…Figure presents the FT-IR spectrum of the CSE with 0 wt % NZSP at 1000–1250 cm –1 ; this wavelength range was focused on investigating the interactions in the CSEs. In this range, all peaks were assigned to the C–O–C band of the polyether-based polymer or the TFSA – band of the Na salt by curve fitting (JASCO Spectrum Manager) and consideration of the literature, as listed in Table . − Peaks 1–3 were ascribed to the asymmetric stretching of the ether bond. Peaks 4–7 corresponded to signals from the dissociated free TFSA – or aggregate of the TFSA salt.…”

Section: Resultsmentioning

confidence: 99%

Polyether/Na₃Zr₂Si₂PO₁₂ Composite Solid Electrolytes for All-Solid-State Sodium Batteries

et al. 2020

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All-solid-state sodium (Na) batteries are attracting attention as alternative systems to lithium-ion batteries because of the high abundance and safety of Na. Although inorganic solid electrolytes have mainly been investigated because of their high ionic conductivity, such electrolytes show low interfacial stability with electrodes in bulk-type all-solid-state batteries. Compared with inorganic solid electrolytes, solid polymer electrolytes show high formability at electrode/electrolyte interfaces and relatively low ionic conductivity. To improve the ionic conductivity and mechanical properties of polymer electrolytes, addition of inorganic powder has been broadly investigated. However, few composite electrolytes of a polymer and Na-conductive inorganic electrolyte with a high content of inorganic electrolyte have been reported. In this study, composite solid electrolytes (CSEs) of a polyether-based polymer and inorganic Na3Zr2Si2PO12 (NZSP) were prepared to utilize the advantages of both materials. The prepared CSEs exhibited increasing ionic conductivity with decreasing NZSP ratio (<50 wt %). Differential scanning calorimetry and Fourier transform infrared spectroscopy analyses indicated that this behavior was caused by the improved segmental mobility of polyether at low NZSP content, which promoted dissociation of the NaTFSA salt. Conversely, CSEs with a high NZSP ratio showed decreased ionic conductivity because the aggregation of NZSP particles increased grain boundary resistance. With a Na metal electrode, the CSE with a high NZSP content (200 wt %) showed lower interfacial resistance and apparent activation energy compared with those of the NZSP-free system. The Na+ transference number of the CSEs was highest for that with a high NZSP content of 200 wt %. Higher NZSP content is therefore expected to realize faster charge transfer during the charge–discharge process than a lower NZSP content. All-solid-state Na–NaCoO2 and Na–sulfur batteries containing the CSE with 200 wt % NZSP operated at 333 K with capacities of 115 and 170 mAh g–1, respectively.

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Section: Resultsmentioning

confidence: 99%

Polyether/Na₃Zr₂Si₂PO₁₂ Composite Solid Electrolytes for All-Solid-State Sodium Batteries

et al. 2020

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“…Isoconversional methods, also called model-free methods, enable reliable calculation of activation energy without assuming a model f(α). The best known linear integral isoconversional methods are the Flynn-Wall-Ozawa (FWO) and modified Kissinger-Akahira-Sunose (KAS) method [12,13], whilst the most known linear differential isoconversional method is that of Friedman (FR) [2,8,14,15].…”

Section: Kinetic Analysismentioning

confidence: 99%

“…ln (β/T 2 ) versus 1/T for each α = const. and by applying linear regression analysis, a series of isoconversional straight lines are obtained, from whose slope the activation energy for a certain conversion is determined [2,6,13].…”

Section: By Including Equation (3) In Equation (mentioning

confidence: 99%

“…Friedman method is based on equation: Also, drawing the dependence ln [β dα/dT] versus 1/T for each α=const. and applying linear regression analysis, a series of isoconversional straight lines are obtained, from whose slope the activation energy for a certain conversion is determined [2,8,15]. The dependence of the activation energy on the conversion provides an insight into the complexity of thermal decomposition process of polymers.…”

Section: By Including Equation (3) In Equation (mentioning

confidence: 99%

“…It shows excellent processability, mechanical properties and has a very wide application in various fields of industry. It is used as a component of packaging materials, in the textile industry and coating industry, as a solid electrolyte in batteries, as a material for thermal energy storage and in the manufacture of dosage forms with controlled release of the active substance [1][2][3][4][5]. During their lifetime, polymers are constantly exposed to various loads and interactions with the environment.…”

Section: Introductionmentioning

confidence: 99%

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Influence of poly(ethylene oxide) sample preparation on the results of thermogravimetric analysis

Čović

Vrandečić

2021

St open

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Aim: To investigate whether the sample preparation process of poly(ethylene oxide) (PEO) affects kinetic analysis of the thermal degradation process. Kinetic analysis was performed to describe the course of a chemical reaction regardless of the reaction conditions and the reaction system complexity. One differential method, the Friedman method, and one integral Kissinger-Akahira-Sunose method (KAS), were applied in this work. Methods: The PEO sample was prepared in 4 different ways. Thermogravimetric analysis was performed to determine the thermal degradation of prepared samples. Infrared spectroscopic analysis was performed during the preparation of the PEO film obtained by casting from the solution. Results: Dynamic thermal decomposition of PEO, regardless of the method of preparation, takes place through a single decomposition stage, which is manifested by the appearance of one peak on derivative thermogravimetric (DTG) curve. During the preparation of the PEO film, the procedure was carried out at a temperature higher than its melting temperature (Tm=65°C). After the cooling, the obtained sample didn’t solidify and it had an intense odor of acetic acid, which was confirmed by infrared spectroscopic analysis. Samples III and IV were re-prepared at a temperature lower than the melting point of PEO, obtaining samples of satisfactory quality. Conclusion: In order to prepare poly(ethylene oxide) films by solution casting technique, drying should be carried out at temperatures below the melting point of PEO. If TG analysis of pure PEO powder is compared with the results of hot pressed samples and solution cast samples, it can be concluded that the preparation of the sample doesn’t affect the thermal stability of the PEO. The dependence of activation energy calculated by the differential Friedman and integral KAS method on conversion is constant for all samples in a broad conversion range, regardless of how the samples were prepared. The hot pressed samples and solution cast samples have lower activation energy than the commercial PEO powder.

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Vitrification Transformation of Poly(Ethylene Oxide) Activating Interface Passivation for High‐Efficiency Perovskite Solar Cells

Qin

Wang

et al. 2019

Solar RRL

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Interface engineering is critical for achieving high-efficiency and high-stability perovskite solar cells (PSCs). Herein, a new interface engineering approachpoly(ethylene oxide) (PEO) modification of SnO 2 quantum dot (QD) film-to improve electron transport is introduced. It is found that when the PEO film is annealed over its glass-transition temperature, the ether-oxygen unshared electron pair in the PEO film activates to form a crosslinking complex with metal ions at the SnO 2 QD and perovskite interface, which triggers heterogeneous nucleation over the perovskite precursor film and is beneficial for achieving uniform and dense perovskite films. PEO is also shown to passivate the bulk defects of perovskite films and the interface defects between SnO 2 QD and perovskite, which promotes electron-transferring from the perovskite layer to cathode. PSCs based on SnO 2 QD with PEO treatment exhibit an enhanced efficiency, leading to a champion PCE of 20.23%, with good reproducibility and stability.

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Miscibility of Poly(Vinyl Chloride) with Poly(Ethylene Oxide) of Different Molecular Weights

Cited by 10 publications

References 39 publications

Polyether/Na₃Zr₂Si₂PO₁₂ Composite Solid Electrolytes for All-Solid-State Sodium Batteries

Polyether/Na₃Zr₂Si₂PO₁₂ Composite Solid Electrolytes for All-Solid-State Sodium Batteries

Influence of poly(ethylene oxide) sample preparation on the results of thermogravimetric analysis

Vitrification Transformation of Poly(Ethylene Oxide) Activating Interface Passivation for High‐Efficiency Perovskite Solar Cells

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Miscibility of Poly(Vinyl Chloride) with Poly(Ethylene Oxide) of Different Molecular Weights

Cited by 10 publications

References 39 publications

Polyether/Na3Zr2Si2PO12 Composite Solid Electrolytes for All-Solid-State Sodium Batteries

Polyether/Na3Zr2Si2PO12 Composite Solid Electrolytes for All-Solid-State Sodium Batteries

Influence of poly(ethylene oxide) sample preparation on the results of thermogravimetric analysis

Vitrification Transformation of Poly(Ethylene Oxide) Activating Interface Passivation for High‐Efficiency Perovskite Solar Cells

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Product

Resources

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Polyether/Na₃Zr₂Si₂PO₁₂ Composite Solid Electrolytes for All-Solid-State Sodium Batteries

Polyether/Na₃Zr₂Si₂PO₁₂ Composite Solid Electrolytes for All-Solid-State Sodium Batteries