IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Methane and Poly(4-methylpentene-1) (PMP)

Components:
   (1) Carbon dioxide with Methane; CO2, CH4; [124-38-9, 74-82-8]  NIST Chemistry WebBook for detail
   (2) Poly(4-methylpentene-1) (PMP); ; [25068-26-2]  NIST Chemistry WebBook for detail

Original Measurements:
   A.C. Puleo, D.R. Paul and P.K. Wong, Polymer 30, 1357-1366 (1989).

Variables:
   Temperature = 308 K
   Pressure = 0-2.2 MPa (0-22 atm)

Prepared By:
   Yu. P. Yampol'skii

Experimental Remarks:

   Within the validity of two-phase model and independence of phase properties of the composition the following local solubility coefficients where found.

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

Table 1. Solubility coefficients S/cm³(STP)/cm³ atm*
T/K	Chemical Name	Keunen coefficient, S	Remark(s)
303	CH4	0.22	Q: Commercial, quenched, X-ray cryst. % =53.6
300	CH4	0.20	S: Commercial, slow cooled, X-ray cryst. % = 61.2
295	CH4	0.19	A: Commercial, annealed, X-ray cryst. % = 66.4
310	CH4	0.18	H: Homopolymer, X-ray cryst. % = 62.7
310	CH4	0.24	1.0X: Cross-linked copolymer with 1 % BBC, X-ray cryst. % = 49.7
313	CH4	0.26	2.5X: Same with 2.5 % BBC, X-ray cryst. % =41.8
326	CH4	0.32	10X: Same with 2.5 % BBC, X-ray cryst. % =21.6
307	CH4	0.20	2.5R: Control; copolymer with 2.5 % 4-phenyl-1-butene unable to be cross-linked, X-ray cryst. % =55.8
303	CO2	0.59	Q: Commercial, quenched, X-ray cryst. % =53.6
300	CO2	0.52	S: Commercial, slow cooled, X-ray cryst. % = 61.2
295	CO2	0.49	A: Commercial, annealed, X-ray cryst. % = 66.4
310	CO2	0.52	H: Homopolymer, X-ray cryst. % = 62.7
310	CO2	0.63	1.0X: Cross-linked copolymer with 1 % BBC, X-ray cryst. % = 49.7
313	CO2	0.69	2.5X: Same with 2.5 % BBC, X-ray cryst. % =41.8
326	CO2	0.83	10X: Same with 2.5 % BBC, X-ray cryst. % =21.6
307	CO2	0.54	2.5R: Control; copolymer with 2.5 % 4-phenyl-1-butene unable to be cross-linked, X-ray cryst. % =55.8

Table 2. Solubility coefficients *k_D*/(cm³(STP)/cm³) atm in amorphous and crystalline phases of PMP
Chemical Name	Henry's law constant, K [cm³(STP)/cm³ atm]	Method/Comments	Remark(s)
CH4	0.351	Amorphous phase	DSC
CH4	0.378	Amorphous phase	X-ray
CO2	0.93	Amorphous phase	DSC
CO2	0.99	Amorphous phase	X-ray
CH4	0.095 ± 0.013	Crystalline phase	DSC
CH4	0.060 ± 0.010	Crystalline phase	X-ray
CO2	0.28 ± 0.03	Crystalline phase	DSC
CO2	0.20 ± 0.02	Crystalline phase	X-ray

Notes:
   ^*  Description of samples seen at continuation sheet.

Method/Apparatus/Procedure:
   The apparatus and procedure for sorption measuring were similar to those described in Ref. (1).

Source and Purity of Materials:
   PMP samples from Polyscience Co with different thermal history as well as the copolymers of PMP and 4-(3-butenyl) benzocyclobutane (BBC) were studied. Their properties are given in Table 3. Nothing on gas purity was indicated.

Estimated Errors:

   Temperature: No information given.