Novel Miscible Blends Composed of Poly(ether sulfone) and Poly(1-vinylpyrrolidone- co -styrene) Copolymers and Their Interaction Energies
2004; American Chemical Society; Volume: 37; Issue: 6 Linguagem: Inglês
10.1021/ma0356156
ISSN1520-5835
AutoresJ. H. Kim, Minji Whang, Chang Keun Kim,
Tópico(s)Polymer Nanocomposites and Properties
ResumoThe miscibility of poly(ether sulfone), PES, with various hydrophilic copolymers containing 1-vinylpyrrolidone or vinyl alcohol as a repeat unit was explored. Among these blends, PES formed homogeneous mixtures with poly(1-vinylpyrrolidone-co-styrene) copolymers, P(VP-S), containing VP from 59 to 92 wt %. Miscible PES blends with P(VP-S) copolymers underwent phase separation on heating caused by lower critical solution temperature type phase behavior. The phase separation temperature of miscible blends first increases gradually with VP content, goes through a broad maximum centered at about 77 wt % VP, and then decreases just prior to the limiting content of VP for miscibility with PES. The calculated interaction energies of PES/P(VP-S) blends indicated that miscibility of these blends stemmed from the intramolecular repulsion between VP and styrene.
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