Miscibility, crystallinity and morphological behavior of binary blends of poly(ethylene oxide) and poly(methyl vinyl ether–maleic acid)

Rocco, Ana Maria; Pereira, Robson Pacheco; Felisberti, Maria I.

doi:10.1016/s0032-3861(00)00784-9

Cited by 77 publications

(30 citation statements)

References 24 publications

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“…Hence the presence of water can decrease the T g of PMVEMAc, which was probably the explanation for a T g reported by Rocco and co-workers, of À9 8C. [30] DSC of the pure polymers and their blends after isothermal treatment of the samples at 70 8C for 30 min ( Figure 5) show a clear feature which can be associated with the T g process. However, we have to admit that this feature may be significantly affected by a dehydration process of the carboxylic groups discussed earlier.…”

Section: Differential Scanning Calorimetrysupporting

confidence: 53%

Characterisation of Blends Based on Hydroxyethylcellulose and Maleic Acid‐alt‐Methyl Vinyl Ether

Khutoryanskaya

Khutoryanskiy

Pethrick

2005

Macro Chemistry & Physics

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Summary: Hydrophilic polymeric films based on blends of hydroxyethylcellulose and maleic acid‐co‐methyl vinyl ether were produced by casting from aqueous solutions. The physicochemical properties of the blends have been assessed using Fourier transform infrared spectroscopy, thermal gravimetric analysis, differential scanning calorimetry, dielectric spectroscopy, etc. The pristine films exhibit complete miscibility due to the formation of intermacromolecular hydrogen bonding. The thermal treatment of the blend films leads to cross‐linking via intermacromolecular esterification and anhydride formation. The cross‐linked materials are able to swell in water and their swelling degree can be easily controlled by temperature and thermal treatment time. The formation of the crosslinks is apparent in the dynamic properties of the blends as observed through the mechanical relaxation and dielectric relaxation spectra. The dielectric characteristics of the material are influenced by the effects of change in the local structure of the blend on the ionic conduction processes and the rate of dipolar relaxation. Separation of these processes is attempted using the dielectric modulus method. Significant deviations from a simple additive rule of mixing on the activation energy are observed consistent with hydrogen bonding and crosslinking of the matrix. This paper indicates a method for the creation of films with good mechanical and physical characteristics by exposing the blends to a relatively mild thermal treatment.

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Section: Differential Scanning Calorimetrysupporting

confidence: 53%

Characterisation of Blends Based on Hydroxyethylcellulose and Maleic Acid‐alt‐Methyl Vinyl Ether

Khutoryanskaya

Khutoryanskiy

Pethrick

2005

Macro Chemistry & Physics

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“…Among them, polymer blending is very useful and convenient method to develop new materials with desirable electrical conductivity and mechanical stability [20]. The main advantages of polymer blend systems are the easy preparations and the control of physical properties which depends on their miscibility and can be achieved simply by changing the blend compositions [21,22].…”

Section: Introductionmentioning

confidence: 99%

Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications

Deshmukh

Ahamed

Polu³

et al. 2016

J Mater Sci: Mater Electron

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New solid polymer blend electrolyte films based on biodegradable polymer blend comprising of polyvinyl alcohol (PVA) and poly (N-vinyl pyrrolidone) (PVP) doped with different wt% of lithium carbonate (Li 2 CO 3 ) salt have been prepared by solution casting method. The resulting PVA/PVP/Li 2 CO 3 polymer blend electrolyte films have been characterized by various analytical techniques such as FTIR, UV-vis, XRD, TGA, polarized optical microscopy and scanning electron microscopy. The FTIR and XRD analysis confirmed the complex formation between PVA/ PVP blend and Li 2 CO 3 salt. The ionic conductivity and the dielectric properties of PVA/PVP/Li 2 CO 3 polymer blend electrolyte films were investigated using an impedance spectroscopy. It was observed that the ionic conductivity of PVA/PVP/Li 2 CO 3 electrolyte system increases as a function of Li 2 CO 3 concentration. The highest ionic conductivity was found to be 1.15 9 10 -5 S cm -1 for polymer blend electrolyte with 20 wt% Li 2 CO 3 content. On the other hand, the dielectric results revealed the non-Debye type of behaviour. The dielectric constant values indicate a strong dielectric dispersion in the studied frequency range which increases as the Li 2 CO 3 content increases. The dielectric constant as high as 1200 (e = 1201.57, 50 Hz, 150°C) and the dielectric loss well below 4 (tan d = 3.94, 50 Hz, 150°C) were obtained for polymer blend electrolytes with 25 wt% Li 2 CO 3 salt. Thus, the results obtained in the present study suggest that the PVA/PVP/ Li 2 CO 3 polymer blend electrolyte system seems to be a promising candidate for solid state battery applications.

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“…Such specific interactions occur, for instance, in blends involving one or two ionomer phase(s). Ionomers are defined as polymer chains on which a small amount of ionic groups is grafted; [2] as a result, intermolecular interactions can be created in blends associating two ionomers [3][4][5] (anioncation interactions) or an ionomer with a polar polymer [6][7][8][9] (ion-dipole interactions). In particular, polystyrene (PS)-based ionomer/poly(ethylene glycol) (PEG) blends have been widely studied in the past 20 years.…”

Section: Introductionmentioning

confidence: 99%

Correlation between Morphology and Mechanical Properties in Zn‐Neutralized Sulfonated Polystyrene Ionomer/Poly(ethylene glycol) Blends: Contribution of EFTEM

Dalmas¹,

Vonet²,

Randriamahefa³

et al. 2010

Macro Chemistry & Physics

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Relationships between microstructure and mechanical properties in SPS‐Zn/PEG blends are investigated. Ion/dipole interactions induce the miscibility of both blend components for PEG content up to 10 wt.‐% as evidenced by DSC and TEM observations. Elemental mapping by EFTEM was used to investigate the ionic cluster microstructure and the phase structure in the blends. PEG chains do not hinder the formation of ionic multiplets but modify the microstructure of the clusters. Moreover, a PEG‐rich layer is observed in the vicinity of the aggregates surface. As a consequence, no cluster glass transition is observed in DMA experiments for these blend systems and besides, the absence of ionic plateau is assigned to the decrease in the ionic clusters' stability.magnified image

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Miscibility, crystallinity and morphological behavior of binary blends of poly(ethylene oxide) and poly(methyl vinyl ether–maleic acid)

Cited by 77 publications

References 24 publications

Characterisation of Blends Based on Hydroxyethylcellulose and Maleic Acid‐alt‐Methyl Vinyl Ether

Characterisation of Blends Based on Hydroxyethylcellulose and Maleic Acid‐alt‐Methyl Vinyl Ether

Impedance spectroscopy, ionic conductivity and dielectric studies of new Li+ ion conducting polymer blend electrolytes based on biodegradable polymers for solid state battery applications

Correlation between Morphology and Mechanical Properties in Zn‐Neutralized Sulfonated Polystyrene Ionomer/Poly(ethylene glycol) Blends: Contribution of EFTEM

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