Development of bicontinuous morphologies in polysulfone–epoxy blends

Oyanguren, Patricia Angelica; Galante, Maria Jose; Andromaque, Katell; Frontini, Patricia María; Williams, Roberto J. J.

doi:10.1016/s0032-3861(98)00742-3

Cited by 97 publications

(69 citation statements)

References 23 publications

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“…The PES-15.9 blend cured at 140 8C (Figure 1a) displays the usual phase-in-phase morphology similar to that described previously. [4,5,7] . The secondary phase separation took place in both phases, which might be due to the interfacial quench-effect proposed by Tanaka.…”

Section: Sem Morphologiesmentioning

confidence: 99%

“…[1][2][3][4][5][6] Williams and co-workers investigated the phenomena of double phase separation in a polysulfone-modified epoxy resin system in 1999. [7] Recently, they explained the phenomenon of ternary thermoplastic-thermosetting blends by the evolution of phase diagrams with conversion. [8] It is well known that the increase of the domain size is mainly caused by the hydrodynamic flow and diffusion.…”

Section: Introductionmentioning

confidence: 99%

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Hydrodynamic Effect on Secondary Phase Separation in an Epoxy Resin Modified with Polyethersulfone

Tang

Zhang

Wang

et al. 2004

Macromol. Rapid Commun.

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Summary: The evolution of the morphologies in blends of epoxy/4,4′‐methylenebis(2,6‐dimethylaniline)/polyethersulfone was followed by time‐resolved light scattering, optical microscopy and scanning electron microscopy. The results suggest that, once the diffusion of epoxy molecules cannot follow the geometrical growth, a secondary phase separation occurs, even in the droplet morphology, in which the size of the epoxy‐rich domain grows as usual. The viscoelastic effect of polyethersulfone is also discussed.Development of morphologies followed by OM: bicontinuous phase separation in the PES‐15.9 blend cured at 140 °C after 80 s.magnified imageDevelopment of morphologies followed by OM: bicontinuous phase separation in the PES‐15.9 blend cured at 140 °C after 80 s.

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Section: Sem Morphologiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Effect on Secondary Phase Separation in an Epoxy Resin Modified with Polyethersulfone

Tang

Zhang

Wang

et al. 2004

Macromol. Rapid Commun.

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“…Chen and Chang [8] revealed that the morphology shifted from a co-continuous structure into small epoxy-rich dispersed particles and finally into an epoxy dispersing phase with an irregular shape or continuous phase depending on the blend composition. Oyanguren et al [9] found that as the cure reaction of epoxy Communication: The results of time-resolved light scattering for the phase separation of epoxy/polyetherimide/ anhydride blends show that the evolution of scattering vector q m follows a Maxwell-type relaxation equation. The relaxation time may be suggested as the time taken for the diffusion of the epoxy-anhydride n-mers from the PEI-rich phase by their relaxation movement, and the apparent activation energy of the relaxation movement is obtained.…”

Section: Introductionmentioning

confidence: 99%

Morphology Evolution during the Phase Separation of Polyetherimide/Epoxy Blends

Gan

Wang

et al. 2003

Macromol. Rapid Commun.

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The results of time‐resolved light scattering for the phase separation of epoxy/polyetherimide/anhydride blends show that the evolution of scattering vector qm follows a Maxwell‐type relaxation equation. The relaxation time may be suggested as the time taken for the diffusion of the epoxy‐anhydride n‐mers from the PEI‐rich phase by their relaxation movement, and the apparent activation energy of the relaxation movement is obtained.Values of qm versus time at different temperatures.magnified imageValues of qm versus time at different temperatures.

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“…However, the high flameproof properties of polysulfones are scanty when they are used as electrical parts or in an epoxy resins network. Poly(sulfone) (PSF) and poly(ether sulfone) (PES) are commonly used for high performance applications such as advanced injection molded engineering parts and as toughness modifiers in epoxy resins (EP) [110][111][112][113][114].…”

Section: Flame Resistant Materialsmentioning

confidence: 99%