Miscibility and Phase Behavior of Poly (Enaminonitrile)/Peo Blends
RENSSELAER POLYTECHNIC INST TROY NY DEPT OF CHEMISTRY
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Recently, we have been synthesizing and studying the properties of polyenaminonitriles, a novel class of polymers which exhibit the thermal stability of aramides but are readily soluble in simple, volatile solvents such as THF and diglyme, as well as in polar, aprotic solvents. Spectroscopic evidence supports specific hydrogen bonded interactions between the NH-groups of the enaminonitrile unit and the oxygen atoms in the ether. Ether solutions exhibit lower critical solution temperature behavior. For the glymes, the critical temperature for phase separation increases as the number -CH2-CH2-0- units increases from one to eleven. A similar tendency is observed for blends with polyethyleneoxide up to PEO contents of 50 wt-. DSC, FT-IR and light scattering data will be presented and discussed.
- Polymer Chemistry