Accession Number : ADA183410

Title :   DSC, Electrical Conductivity, and NMR Studies of Salt Precipitation in PPO Complexes.

Descriptive Note : Interim rept.,

Corporate Author : HUNTER COLL NEW YORK DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Fontanella,John J ; Wintersgill,Mary C ; Greenbaum,Steven G ; Adamic,Kresimir J

PDF Url : ADA183410

Report Date : 01 Jul 1987

Pagination or Media Count : 23

Abstract : DSC and electrical conductivity measurements of PPQ complexed with Sodium Iodide and Potassium Thiocyanine are reported. In addition, 23 NMR measurements of PPO8NaI, both at ambient and elevated pressure (2.0 kbar) have been performed. The DSC data clearly indicate that the salt precipitates out of the complexes at about 85 for NaI and 60C for KSCN. These effects are manifested by a dramatic departure of the conductivity form VTF behavior, and a relatively sharp drop in mobile Na concentration deduced from NMR measurements at somewhat elevated temperature (about 80C). High pressure NMR linewidth measurements are consistent with a pressure-induced increase in the glass transition temperature.

Descriptors :   *POLYPROPYLENE, *OXIDES, *CHEMICAL PRECIPITATION, ELECTRICAL CONDUCTIVITY, ELECTRICAL MEASUREMENT, GLASS, HIGH PRESSURE, HIGH TEMPERATURE, IODIDES, POTASSIUM, PRECIPITATION, SALTS, SODIUM, TRANSITION TEMPERATURE

Subject Categories : Physical Chemistry
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE