Summary
1. Linseed oil has been polymerized at 300° for 1.5, 3, and 6 hours. The polymeric glycerides have been separated from the monomeric glycerides, and the derived methyl esters of each fraction have been analyzed for monomer, dimer, and trimer.
2. The monomeric glycerides show very little intradimerization, ranging from 1.3 to 6% of their acid groups, or 3 to 4% of the total polymeric acid groups in the whole oil.
3. The polymeric glycerides show appreciable intradimerization, from 10 to 20% of their total polymeric acid groups.
4. There is no evidence that a shift from intra- to interdimerization is the major cause of the sudden increase in viscosity in the later stages of thermal polymerization.
5. The rapid rise in viscosity is due to the nature of the relationship of viscosity to molecular weight and of molecular weight to extent of reaction in the difunctional polymerization system present.
Similar content being viewed by others
References
Bradley, T. F., Ind. Eng. Chem.,30, 689 (1938).
Adams, H. E., and Powers, P. J., J. Appl. Phys.17, 325 (1946).
Barker, C., Crawford, R. V., and Hilditch, T. P., J. Oil and Colour Chem. Asso.,34, 215 (1951).
Boelhouwer, C., Jol, A. C., and Waterman, H. I., Research,5, 336–9 (1952).
Wiseblatt, L., Wells, A. F., and Common, R. H., J. Sci. Food Agr.,4, 227–233 (1952).
Joubert, F. J., and Sutton, Donald A., J. Am. Oil Chem. Soc.,29, 287–291 (1952).
Steger, A., and van Loon, J., Rec. Trav. Chim.,54, 428–33, 756–9 (1935).
Steger, A., and van Loon, J., Fettchem Umschau,42, 217–9 (1935).
Paschke, R. F., and Wheeler, D. H., J. Am. Oil Chem. Soc.,26, 278–83 (1949).
Barker, C., Crawford, R. V., and Hilditch, T. P., J. Oil Colour Chem. Asso.,34, 215 (1951).
Joubert, F. J., and Sutton, D. A., J. Am. Oil Chem. Soc.,29, 287–91 (1952).
Boelhouwer, C., Jol, A. C., and Waterman, H. I., Research,5, 336–9 (1952).
Wiseblatt, L., Wells, A. F., and Common, R. H., J. Sci. Food Agric.,4, 227–233.
Skraup, S., and Hedler, L., Chem. Ber.,85, 1161–7 (1952).
Paschke, R. F., Kerns, J. R., and Wheeler, D. H., paper presented at 44th meeting of American Oil Chemists’ Society, May 6, 1953. To be published in the Journal.
Brice, B. A., Swain, M. L., Herb, S. F., Nichols, P. L. Jr., and Riemenschneider, R. W., J. Am. Oil Chem. Soc.,29, 279–287 (1952).
Jackson, J. E., Paschke, R. F., Tolberg, W., Boyd, H. M., and Wheeler, D. H., J. Am. Oil Chem. Soc.,29, 229–34 (1952).
Wells, A. F., and Common, R. H., J. Sci. Food Agr.,4, 233–7 (1953).
Paschke, R. F., Jackson, J. E., and Wheeler, D. H., Ind. Eng. Chem.,44, 1113–1118 (1952).
Cowan, J. C.,et al., Ind. Eng. Chem.,41, 1648 (1949).
Clark, E. P., Ind. Eng. Chem., Anal. Ed.,13, 820 (1941).
Author information
Authors and Affiliations
Additional information
Paper No. 158, journal series, General Mills Research Laboratories, Minneapolis, Minn.
About this article
Cite this article
Paschke, R.F., Wheeler, D.H. Inter- and intramolecular polymerization in heat-bodied linseed oil. J Am Oil Chem Soc 31, 208–211 (1954). https://doi.org/10.1007/BF02636433
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02636433