2009
DOI: 10.1002/chem.200801555
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Phase Behavior in Blends of Ethylene Oxide–Propylene Oxide Copolymer and Poly(ether sulfone) Studied by Modulated‐Temperature DSC and NMR Relaxometry

Abstract: The state diagram of a blend consisting of a copolymer containing ethylene oxide and propylene oxide, P(EO-ran-PO), and poly(ether sulfone), PES, is constructed by using modulated-temperature differential scanning calorimetry (MTDSC), T(2) NMR relaxometry, and light scattering. The apparent heat capacity signal in MTDSC is used for the characterization of polymer miscibility and morphology development. T(2) NMR relaxometry is used to detect the onset of phase separation, which is in good agreement with the ons… Show more

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Cited by 6 publications
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“…The presence of an excess heat capacity resulting from (reversible) demixing and remixing induced by the temperature modulation was evidenced before in polymer-water solutions, 18,56,60 hydrogels, 61 and polymer blends. 62,63 The gradual increase in c p excess can be attributed to a gradual increase in the interfacial contact area between the coexisting phases. 56,64 Unfortunately, the observed slow increase of c p app does not allow distinguishing between a nucleation and growth or spinodal decomposition (plus coarsening) mechanism.…”
Section: Methodsmentioning
confidence: 99%
“…The presence of an excess heat capacity resulting from (reversible) demixing and remixing induced by the temperature modulation was evidenced before in polymer-water solutions, 18,56,60 hydrogels, 61 and polymer blends. 62,63 The gradual increase in c p excess can be attributed to a gradual increase in the interfacial contact area between the coexisting phases. 56,64 Unfortunately, the observed slow increase of c p app does not allow distinguishing between a nucleation and growth or spinodal decomposition (plus coarsening) mechanism.…”
Section: Methodsmentioning
confidence: 99%