IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with Polymers

Components:
   (1) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail
   (2) Polymers; ; []  NIST Chemistry WebBook for detail

Original Measurements:
   Marvel, C.S.; Harkema, J.; Copley, M.J., J. Am. Chem. Soc,. 63, 1609 (1941).

Variables:
   Temperature = 298 K and 303 K

Prepared By:
   V. P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Solubility of polymers in nitromethane
t/°C	T/K	Chemical Name	10² * Mass Fraction w₂ (compiler)	g₂/g₁
25	298	Poly(1-acetoxy-1,2-ethanediyl)* (polyvinylacetate); (C6H6O2)n; [9003-20-7]	48	93
25	298	Poly 1-(methylcarbonyl)1,2-ethanediyl* (polymethylvinyl ketone); (C4H6O)n	26	35
25	298	Poly 1-(methoxycarbonyl)-1-methyl-1,2-ethanediyl (polymethyl methacrylate); (C5H8O2)n; [9011-14-7]	16	19
30	303	Vinylite* (copolymer of vinyl chloride and vinyl acetate containing 34.1% Cl)	2.0	2.1
30	303	Cellulose acetate; [9004-35-7]	0.017	0.017
30	303	Poly(1-chloro-1,2-ethanediyl)* (polyvinylchloride); (C2H3Cl)n; [25038-46-4]	0.004	0.004

Method/Apparatus/Procedure:
   The method described in Marvel, et al.¹ was used. The solubility determinations were made by adding an excess of the polymer to the solvent in a glass-stoppered bottle. The stoppered bottle was placed in a rotating device in a thermostat at 30 °C for 48 h. The saturated solution was removed weighed, evaporated and the residue weighed. This method worked well in cases where the solubility was low. In other cases, a weighed amount of solvent was added to a weighed sample of polymer. The mixture was shaken and allowed to stand at 25 °C for 48 h to see whether it became homogeneous. It was impossible to make accurate measurements even by this procedure. Hence the values given in the table for these high solubilities are to be regarded as minimum values.

Source and Purity of Materials:
   (1) Source not specified; laboratory sample; redistilled and collected over a 2 °C boiling range.
   (2) Some polymers (*) obtained from Carbide and Carbon Chemicals Corp.; others from du Pont Co.; technical grade.

Estimated Errors:
   Solubility: about 10 % (relative error).
   Temperature: ± 1 K,

References:
   ¹ C. S. Marvel, F. C. Dietz, and M. J. Copley, J. Am. Chem. Soc. 62, 2273 (1940).