Miscibility of PVC/PEO blends by viscosimetric, microscopic and thermal analyses

Neiro, Sérgio Mauro da Silva; Dragunski, Douglas Cardoso; Rubira, Adley F.; Muniz, Edvani C.

doi:10.1016/s0014-3057(99)00082-8

Cited by 49 publications

(17 citation statements)

References 36 publications

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“…High molecular weight samples of the novel biodegradable polyester poly(ethylene sebacate) (PESeb) with poly(4-vinyl phenol) (PVPh) blends were studied, with respect to miscibility, by Papageorgiou et al [37]. A single glass transition temperature intermediate to those of pure compo criterion of miscibility et al [28], Marcos et al [35], and Cimmino et al [24].…”

Section: Resultsmentioning

confidence: 99%

Miscibility Behavior of Polyacrylamides Poly(Ethylene Glycol) Blends: Flory Huggins Interaction Parameter Determined by Thermal Analysis

Silva¹,

Mano²,

Pacheco³

et al. 2013

JMP

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Blends of polyacrylamide—PAM, poly(N-isopropylacrylamide)—PNIPAAm, poly(N-tert-butylacrylamide)—PTBAA, poly(N,N-dimethylacrylamide)—PDMAA and poly(N,N-diethylacrylamide)—PDEAA with poly(ethylene glycol)— PEG were prepared by casting in methanol and water at concentrations of 20 wt%, 40 wt%, 60 wt%, and 80 wt% in PEG. The miscibility of the components was studied by Differential Scanning Calorimetry—DSC. All blend systems are characterized by a single glass transition temperature (T_g), close to the T_g of the amorphous component. The Hoffman Weeks method was used to determine equilibrium melting temperature (T_m) data. The determination of the melt point depression of the blends allowed the calculation of Flory-Huggins interaction parameter (χ₁₂) of the two polymers in the melt, by using the Nishi Wang equation. The interaction parameters, calculated for all the blends, are slightly negative and close to zero, suggesting a partial miscibility between the components.

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Section: Resultsmentioning

confidence: 99%

Miscibility Behavior of Polyacrylamides Poly(Ethylene Glycol) Blends: Flory Huggins Interaction Parameter Determined by Thermal Analysis

Silva¹,

Mano²,

Pacheco³

et al. 2013

JMP

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“…The ratios of PLA ( w PLA ) and PEO ( w PEO ) and the viscosities for the pure polymer solutions of PLA (η PLA ) and PEO (η PEO ) were used to determine K H . The α parameter provided a measure of polymer–polymer interaction in the blends 22, 32…”

Section: Methodsmentioning

confidence: 99%

Properties of poly(lactic acid) and poly(ethylene oxide) solvent polymer mixtures and nanofibers made by solution blow spinning

Oliveira

Moraes

Marconcini

et al. 2013

J of Applied Polymer Sci

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The properties of mixtures of poly(lactic acid) (PLA) and poly(ethylene oxide) (PEO) were studied in polymer solutions by dilute solution viscometry, and in-solution blow-spun nanofibers were studied by microscopy (scanning electron and transmission electron microscopy) and thermal and spectral analysis. Three mixtures of PLA and PEO (3:1, 1:1, and 1:3) were solution-blended in chloroform. Dilute solvent viscometry indicated that the 3:1 mixture of PLA and PEO had a higher miscibility coefficient value than the other mixtures. The neat polymers and mixtures were solution-blow-spun into nanofibers. The fiber diameters were smallest in the neat polymers. Transmission electron micrographs revealed a core/sheath structure for the sample mixtures. X-ray analysis indicated that the crystallinity was positively correlated with the PEO content. Fibers from the mixtures had contact angle measurements similar to those of the neat PEO. Fourier transform infrared and Raman spectroscopy of the mixtures indicated interactions between ester and ether groups, which were attributed to dipole-dipole interactions between the ester groups of PLA and the ether groups of PEO.

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“…The polymer miscibility is due to the presence of strong intermolecular interactions like hydrogen bonding, between the chlorine atoms of PVC with PEO, having non-bonded electrons, like oxygen. The presence of strong interaction reduces the Gibbs free energy which is an indication of homogenous mixing of polymers [63][64]. Next section further correlates the DSC parameters with electrical properties.…”

Section: Differential Scanning Calorimetry (Dsc) Analysismentioning

confidence: 98%

Structural, microstructural and electrochemical properties of dispersed-type polymer nanocomposite films

Arya¹,

Sharma²

2018

J. Phys. D: Appl. Phys.

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The free standing solid polymer nanocomposite (PEO-PVC)+LiPF6-TiO2 films has been prepared through standard solution cast technique. The improvement in structural, microstructural and electrochemical properties has been observed on the dispersion of nanofiller in polymer salt complex. X-Ray diffraction studies clearly reflect the formation of complex formation as no corresponding salt peak appeared in the diffractograms. The FTIR analysis suggested a clear and convincing evidence of polymer-ion, ion-ion and polymer-ion-nanofiller interaction. The highest ionic conductivity of the prepared solid polymer electrolyte films is ~5×10 -5 S cm -1 for 7 wt. % TiO2.The Linear Sweep Voltammetry provide the electrochemical stability window of the prepared solid polymer electrolyte films, which is of the order of ~3.5 V. The ion transference number has been estimated, tion =0.99 through dc polarization technique. Dielectric spectroscopic studies were performed to understand the ion transport process in polymer electrolytes. All solid polymer electrolyte possesses good thermal stability up to 300 °C. DSC analysis confirms the decrease of melting temperature and signal of glass transition temperature with addition of nanofiller which indicates the decrease of crystallinity of polymer matrix. An absolute correlation between diffusion coefficient (D), ion mobility (μ), number density (n), double layer capacitance (Cdl), glass transition temperature, melting temperature (Tm), free ion area (%) and conductivity (σ) has been observed. A convincing model to study the role of nanofiller in polymer salt complex has been proposed which supports the experimental findings. The prepared polymer electrolyte system with significant ionic conductivity, high ionic transference number, good thermal, voltage stability could be suggested as a potential candidate as electrolyte cum separator for fabrication of rechargeable lithium-ion battery system. IntroductionFrom last two decades, lithium ion batteries (LIB) are widely investigated energy source for the portable electronics because of attractive features like high energy density, shape mouldability, design flexibility, zero memory loss and high safety. The desirable characteristics of polymer electrolytes for R&D application in LIB are good compatibility with electrode materials, leakage proof, longer shelf life, high capacity and light weight [1]. The conductivity in solid state conductors was reported first time by Faraday in 1800s, and later the discovery of poly ethylene oxide (PEO) and alkali metal salts (NaI) system in the 1970s was contributed by Wright and coworkers. Then, Armand realized their technological importance due to flexibility, deformability and introduced the first new class of solid state ionic conductors (SSIC). Solid Polymer electrolytes (SPEs) comprising the high electrical conductivity along with mechanical flexibility, faster segmental motion of polymer chain makes them, best substitute over liquid electrolytes in electrochemical devices such as supercapacitor, cell ...

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Miscibility of PVC/PEO blends by viscosimetric, microscopic and thermal analyses

Cited by 49 publications

References 36 publications

Miscibility Behavior of Polyacrylamides Poly(Ethylene Glycol) Blends: Flory Huggins Interaction Parameter Determined by Thermal Analysis

Miscibility Behavior of Polyacrylamides Poly(Ethylene Glycol) Blends: Flory Huggins Interaction Parameter Determined by Thermal Analysis

Properties of poly(lactic acid) and poly(ethylene oxide) solvent polymer mixtures and nanofibers made by solution blow spinning

Structural, microstructural and electrochemical properties of dispersed-type polymer nanocomposite films

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