Accession Number : ADA182350

Title :   DSC, Electrical Conductivity, and NMR Studies of Salt Precipitation Effects in PPO (Poly(propylene oxide) Complexes.

Descriptive Note : Interim technical rept.,

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

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

PDF Url : ADA182350

Report Date : 01 Jul 1987

Pagination or Media Count : 18

Abstract : DSC and electrical conductivity measurements of poly(propylene oxide) complexed with sodium iodide and potassium thio cyanide are reported. In addition, 23Na 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 C for NaI and 60 C for KSCN. These effects are manifested by a dramatic departure of the conductivity from VTF behaviour, and a relatively sharp drop in mobile sodium concentration deduced from nuclear magnetic resonance measurements at somewhat elevated temperature (about 80 C). High pressure NMR linewidth measurements are consistent with a pressure-induced increase in glass transition temperature.

Descriptors :   *ELECTRICAL CONDUCTIVITY, *OXIDES, *PRECIPITATION, *SALTS, *POLYPROPYLENE, *CHEMICAL ANALYSIS, HIGH PRESSURE, ELECTRICAL MEASUREMENT, GLASS, TRANSITION TEMPERATURE, MEASUREMENT, NUCLEAR MAGNETIC RESONANCE, POLYMERS, PROPENES, IODIDES, SODIUM, COPOLYMERS, GLYCOLIC ACID, ROTATION(CHEMICAL BONDS), PHASE SHIFT, ACTIVATION ENERGY, SODIUM COMPOUNDS, RELAXATION TIME, CALORIMETRY, POTASSIUM COMPOUNDS, THIOCYANATES

Subject Categories : Polymer Chemistry
      Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE