Thermodynamic interactions in rubbery polymer/gas systems

✍ Scribed by Yoshinori Kamiya; Yasutoshi Naito; Keishin Mizoguchi; Katsuhiko Terada; Johann Moreau

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 124 KB
• Volume: 35
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/(sici)1099-0488(199705)35:7<1049::aid-polb4>3.0.co;2-r

✦ Synopsis

The Flory-Huggins interaction parameters x for 23 gases (He, Ne, Ar, Kr, Xe, H 2 , N 2 , O 2 , N 2 O, CO 2 , CH 4 , C 2 H 4 , C 2 H 6 , C 3 H 6 , C 3 H 8 , 1,3-C 4 H 6 , four C 4 H 8 's, n-C 4 H 10 , iso-C 4 H 10 , and n-C 5 H 12 ) in five rubbery polymers (1,2-polybutadiene (PB), poly(ethylene-co-vinyl acetate) (EVAc), polyethylene (PE), polypropylene (PP), and poly(dimethyl siloxane) (PDMS) were determined from either literature data on Henry's law coefficient and partial molar volume or those on sorptive dilation for each polymer/gas system. Values of x for the gases increased in the order of PDMS õ PP É PB õ EVAc É PE. Among the gases except He and H 2 whose x values are not reliable, Ne and Xe have respectively the highest and the lowest values of x for the polyolefins. The x values of the hydrocarbons were compared together with previously reported x values of n-alkanes C 3 -C 10 . The dependencies of x upon concentration and temperature were discussed on the basis of the literature data.