NEW TECHNIQUE FOR DETERMINING POLYMER-POLYMER MISCIBILITY

Two-component polymer blends have long been attracting considerable interest both because of their commercial utility and their scientific importance. From either viewpoint, the phase behavior of these systems is of direct significance, considering that partial or complete solubility usually gives rise to improved properties, 1-6 and systems exhibiting high solubility are likely to provide valuable clues about the interactions between unlike macromolecules. Therefore, it is interesting to know to what extent two polymers are mutually soluble; that is, at what composition does phase separation occur. Upon correlating this with the structure, two-component systems with specific properties can be designed with greater facility, and more data will be available for testing and improving the theory7-8 of phase behavior for polymer-polymer systems. © 1979, American Chemical Society. All rights reserved.