Pseudobinary blends

Phase separation in initially miscible blends of thermoplastic (TP) and epoxy-diamine occurs during the reaction because the increase in the molecular weight of epoxy-amine copolymers diminishes the entropy of the blend. We can consider our systems as pseudobinary blends of TP and copolymer epoxy-amine for ease of understanding. The Flory-Huggins theory can be used in this case (I, 2). The miscibility during the reaction is controlled by the... 

This interpretation shows that the viscoelastic measurements can characterize the phase-separation mechanism in TP-modified epoxy systems. If we apply the Flory-Huggins theory to this pseudobinary blend (20), the calculated phase diagrams are in very good agreement with the morphologies encoun-... 

Figure 8. Calculated phase diagram for a pseudobinary blend of TGDDM-diamine and TP during cure at 160 °C.

Blending of sucrose distearate with C EOs was shown by Aramaki et al. to have a synergistic effect on lamellar phase production in the pseudobinary system with water [102]. This translated into a substantial increase in ability to solubilize water and -decane in the bicontinuous microemulsion formed by these materials. Addition of only 10% sucrose distearate increased the capacity by approximately three times that of C12EO6 alone. Interestingly, the same effect was not found with sucrose monostearate as the HLB of the added surfactant was important. 

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