✦ LIBER ✦

Temperature and concentration dependence of diffusion coefficients in ethylene–propylene-diene copolymers

✍ Scribed by V. Muralidharan; Anil Tihminlioglu; Olivia Antelmann; J. Larry Duda; Ronald P. Danner; Andre De Haan

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 152 KB
Volume: 36
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(19980730)36:10<1713::aid-polb12>3.0.co;2-c

No coin nor oath required. For personal study only.

✦ Synopsis

Self-diffusion and partition coefficients were measured for two commercial ethylene-propylene-diene copolymers (EPDM) and five solvents at infinite dilution using inverse gas chromatography. Mutual diffusion coefficients for solvents in EPDM also were measured for finite concentration using gravimetric sorption for three of the solvents. From the inverse gas chromatography experimental values for self-diffusion coefficients were obtained. Free-volume parameters were obtained through regression of the self-diffusion coefficient as a function of temperature. Mutual diffusion coefficients as a function of concentration were predicted using free volume theory and compared with experimental data obtained using gravimetric sorption.

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