Journal ArticleDOI
Phase Behavior and Hydrogen Bonding in Ternary Polymer Blends of Phenolic Resin/Poly(ethylene oxide)/Poly(ε-caprolactone)
TLDR
In this article, the phase behavior and hydrogen bonding in ternary polymer blends of phenolic resin, poly(ethylene oxide) (PEO), and poly(e-caprolactone)(PCL) were investigated by using differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR).Abstract:
The phase behavior and hydrogen bonding in ternary polymer blends of phenolic resin, poly(ethylene oxide) (PEO), and poly(e-caprolactone) (PCL) were investigated by using differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). Although all three binary blends are respective miscible, there exists a closed immiscibility loop in the phase diagram due to the so-called “Δχ” and “ΔK” effects in this hydrogen-bonded ternary polymer system. The interassociation equilibrium constant based on the Painter−Coleman association model between phenolic resin and PEO can be indirectly calculated from the fraction of hydrogen-bonded carbonyl groups. Quantitative analyses show that the hydroxyl−ether interassociation is more favorable than the hydroxyl−carbonyl interassociation at room temperature. The interaction energy density value of BPEO/PCL= −2.85 cal/cm3 was obtained by comparing the theoretically predicted phase diagram with experimental data.read more
Citations
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Superabsorbent crosslinked carboxymethyl cellulose-PEG hydrogels for potential wound dressing applications
Nádia S.V. Capanema,Alexandra A.P. Mansur,Anderson C. Jesus,Sandhra M. Carvalho,Luiz Cláudio Vieira de Oliveira,Herman S. Mansur +5 more
TL;DR: This study focused on the synthesis and comprehensive characterization of environmentally friendly hydrogel membranes based on carboxymethyl cellulose for wound dressing and skin repair substitutes and demonstrated that superabsorbent hydrogels (SAP) were produced with swelling degree typically ranging from 100% to 5000%, which was significantly dependent on the concentration of CA crosslinker and the addition of PEG as network modifier.
Journal ArticleDOI
Hydrogen-bonding in polymer blends
TL;DR: In this paper, the effects of hydrogen bonding on the miscibility and thermal properties of polymer blend systems are discussed in detail, and the effect of the presence of functional groups on these properties is discussed.
Journal ArticleDOI
Miscibility and crystallization of poly(ethylene oxide) and poly(ε-caprolactone) blends
TL;DR: In this article, phase contrast microscopy was used to probe the miscibility of poly(ethylene oxide) (PEO) with poly(e-caprolactone) (PCL), both semicrystalline polymers.
Journal ArticleDOI
Ionic conductivity enhancement of the plasticized PMMA/LiClO4 polymer nanocomposite electrolyte containing clay
TL;DR: In this paper, the authors demonstrated that the addition of an optimum content of dimethyldioctadecylammonium chloride (DDAC)-modified montmorillonite clay (Dclay) enhances the ionic conductivity of the plasticized poly(methyl methacrylate)-based electrolyte by nearly 40 times higher than the plain system.
Journal ArticleDOI
Effect of hydrogen bonding strength on the microstructure and crystallization behavior of crystalline polymer blends
TL;DR: In this paper, the influence of hydrogen bonding strength on the crystallization kinetics and morphologies in poly(e-caprolactone) (PCL) blends with three different well-known hydrogen bond donating polymers, i.e., phenolic, polyvinylphenol (PVPh), and phenoxy, was investigated.
References
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Journal ArticleDOI
Melting Point Depression and Kinetic Effects of Cooling on Crystallization in Poly(vinylidene fluoride)-Poly(methyl methacrylate) Mixtures
Toshio Nishi,T. T. Wang +1 more
TL;DR: In this paper, an analytical expression appropriate to the crystalline-amorphous polymer pair is derived from Scott's equation for thermodynamic mixing of two polymers, indicating that the system is compatible in the molten state.
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The Thermodynamics of High Polymer Solutions. V. Phase Equilibria in the Ternary System: Polymer 1—Polymer 2—Solvent
TL;DR: In this paper, a thermodynamic analysis of phase equilibria similar to that developed in Part IV when applied to the ternary system of two polymers and a solvent leads to an explanation of the usual incompatibility of different high polymers in solution.
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Hydrogen bonded polymer blends
TL;DR: In this article, a progress report on hydrogen-bonded polymer blends is presented. But, it is not a complete review of all the theoretical and experimental developments that have occurred over the last three or so years.
Journal ArticleDOI
Concerning the miscibility of poly(vinyl phenol) blends — FTi.r. study
TL;DR: In this paper, the results of a Fourier transform infrared study of poly(vinyl phenol) (PVPh) blends containing a number of chemically and structurally dissimilar polymers are presented.