IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitrogen with Methane and Copoly(pyromellitic dianhydride-isopropylidine dianiline) PMDA-IPDA

Components:
   (1) Copoly(pyromellitic dianhydride-isopropylidine dianiline) PMDA-IPDA; ; []  NIST Chemistry WebBook for detail
   (2) Nitrogen with Methane; N2, CH4; [7727-37-9, 74-82-8]  NIST Chemistry WebBook for detail

Original Measurements:
   T.M. Kim, W.J. Koros, G.R. Husk and K.C. O'Brian, J. Appl. Polym. Sci. 34, 1767 (1987).

Variables:
   Temperature = 308 K
   Pressure = 0-2.1 MPa

Prepared By:
   Yu. P. Yampol'skii

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)

Sorption isotherms of methane and nitrogen in PMDA-IPDA at 308 K (The original data were represented graphically)
Chemical Name	Pressure [MPa]	Sorption [(V₁(STP)/V₂)]
CH4	0.60	10.01
CH4	1.05	13.62
Ch4	1.53	16.44
Ch4	2.02	18.47
N2	0.29	1.55
N2	0.47	2.29
N2	0.55	2.54
N2	0.76	3.36
N2	0.83	3.70
N2	1.17	4.84
N2	1.51	5.99
N2	1.81	6.84
N2	2.09	7.51

Method/Apparatus/Procedure:
   The pressure decay method of measurement of sorption was described in Ref. 1.

Source and Purity of Materials:
   PMDA-IPDA: prepared by reaction of pyromellitic dianhydride with isopropylidene diamine. No details on synthesis or properties of the polymer are given.

Estimated Errors:

   Temperature: No information given.

References:
   ¹W. 3. Koros and D. R. Paul, J. Polym. Sci., Polym. Plays. Ed. 14, 1903 (1976).