IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Nitrogen with Polycarbonate (PC)
Components:
   (1) Polycarbonate (PC); ; [24936-68-3]  NIST Chemistry WebBook for detail
   (2) Nitrogen; N2; [7727-32-9]  NIST Chemistry WebBook for detail
Original Measurements:
   W.J. Koros and D.R. Paul, J. Polym. Phys. Ed. 14, 1903 (1976).

 Variables:
   Temperature = 308 K
   Pressure = 0.1-2.6 MPa

 Prepared By:
   A.K. Bokarev

 Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
   
Sorption parameters of nitrogen in polycarbonate at 308 K (The original data were represented graphically)
Pressure [MPa]Sorption [(V*1(STP)/V*2)]
0.080.18
0.110.21
0.140.27
0.190.42
0.300.58
0.400.69
0.601.03
0.751.34
0.901.58
1.141.85
1.292.01
1.372.14
1.442.21
1.632.47
1.822.72
2.032.96
2.253.18
2.293.24
2.493.50
2.603.57
2.593.63
 Method/Apparatus/Procedure:
   Measurement of gas solubility was performed using a pressure decay method with a dual-volume dual transducers system (see also Ref. 1). In order to achieve superior precision the ratio of the two working volumes should be close to 1. It was shown that the reduction of the ratio from 9.7 to 1.45 resulted in much less scatter.

 Source and Purity of Materials:
   N2: purity >99 %. PC (Bisphenol A polycarbonate): Lexan, General Electric Co., Mw = 35 800.

 Estimated Errors:
   Solubility: Relative precision of solubilities: ±0.07 cm3(STP)/cm3 polymer.

 References:
   1W. J. Koros, D. R. Paul, and A. A. Rocha, J. Polym. Sic., Polym. Phys. Ed. 14, 687 (1976).