POLYMER STRUCTURES AND PROPERTIES
Rept. for 1 Feb 1960-30 Apr 1961
CARNEGIE-MELLON UNIV PITTSBURGH PA MELLON INST OF SCIENCE
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Investigations relating to dilute solutions of polymers comprised a theoretical treatment of Rayleigh scattering to include both intramolecular and intermolecular optical interference effects the temperature dependence of the second virial coefficient for polystyrene in cyclohexane the intrinsic viscosity-molecular weight relation for poly-vinyl acetate in butanone and design and construction of a precision light scattering photometer. The melt viscosity-molecular weight relation at 218C for monodisperse polystyrene prepared anionically was found to be identical with that for ordinary fractions. Poly-vinyl acetate, prepared by an emulsion polymerization in the presence of a protein, yielded an insoluble component containing bound protein. Preliminary stress-strain measurements on cross-linked swollen polyethylene gave only equivocal evidence for specific solvent effects on the unperturbed randomflight dimensions of the polymer chains.