Investigations of the effects of isotopic substitution and pressure of miscibility in polymer-polymer and polymer-solvent systems. Technical progress report, March 1991--March 1992

摘要

Design, construction, and calibration of the polymer-solvent light scattering apparatus is complete. Preliminary results for the polystyrene-acetone system have been reported; theory has been developed also. Measurements on the polystyrene-acetone and polystyrene-methyl cyclopentane systems have been completed (abstract is included). Near tri-critical behavior is exhibited in the acetone-polystyrene system in its hypercritical point. Data on phase separation in polymer-polymer solutions by light scattering using spinodal quench techniques have been obtained. Methods have been worked out to synthesize perdeutero-methylcyclopentane and 1,1-dideuteropropionitrile. A review article has been prepaired summarizing the field of isotopomer solution thermodynamics.