ISSN:
0887-6266
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Mass sorption/desorption and volume dilation/consolidation measurements are reported for tetramethyl and hexafluoro polycarbonate samples in the presence of carbon dioxide pressures up to 900 psia at 35°C. These results are combined with previous results for bisphenol-A-polycarbonate. The combined sorption and volume dilation measurements are used to analyze the thermodynamics of the three gas-polymer systems, and the partial specific volumes of carbon dioxide and the polymer are reported as functions of sorption level. Desorption and subsequent resorption measurements with the substituted polycarbonates show large and long-lived hysteretic effects similar to those seen with standard bisphenol-A-polycarbonate. Finally, assumptions inherent in the dual-mode model are shown to provide a satisfactory description of the volume dilation behavior for the substituted polymers.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/polb.1990.090280711
