Some Physical Properties of Birch Carbonized in A Nitrogen Atmosphere


  • G. R. Moore
  • P. R. Blankenhorn
  • F. C. Beall
  • D. E. Kline


<i>Betula</i> sp, heat treatment, shrinkage, dynamic elastic modulus, internal friction, thermal degradation


The dynamic mechanical properties, mass loss, and shrinkage data of birch carbonized in a nitrogen atmosphere to different temperatures from 473 to 973 K have been investigated. The dynamic elastic modulus data decreased as the heat treatment temperatures approached 673 K. Major mass loss and shrinkage accompanied the decrease in the modulus data. Treatments at higher temperatures (> 673 K) produced substantially less additional mass loss and shrinkage but produced increased rigidity in the char. The internal friction behavior of the char was complex.


Beall, F. C., P. R. Blankenhorn, and G. R. Moore. 1974. Carbonized wood—physical properties and use as an SEM preparation. Wood Sci. 6(3):212-219.nBernier, G. A., and D. E. Kline. 1968. Dynamic mechanical behavior of birch compared with methyl methacrylate impregnated birch from 90 to 475 K. For. Prod. J. 18(4):79-82.nBlankenhorn, P. R. 1972. Dynamic mechanical behavior of black cherry (Prunus serotina Ehrh.). Ph.D. Thesis, The Pennsylvania State University, University Park, Pennsylvania.nBlankenhorn, P. R., G. M. Jenkins, and D. E. Kline. 1972. Dynamic mechanical properties and microstructure of some carbonized hardwoods. Wood Fiber 4(3):212-224.nBlankenhorn, P. R., D. E. Kline, and F. C. Beall. 1973. Dynamic mechanical behavior of carbonized black cherry wood (Prunus serotina Ehrh.). Carbon 11:603-611.nHarada, H. 1965. Ultrastructure of angiosperm vessels and ray parenchyma. Pages 235-249 in W. A. Côté, ed., Cellular ultrastructure of woody plants, Syracuse University Press, Syracuse, N. Y.nJenkins, G. M., and K. Kawamura. 1971. Structure of glassy carbon. Nature 231:175-176.nKline, D. E. 1956. A recording apparatus for measuring the dynamic mechanical properties of polymers. J. Polymer Sci. 22:449-454.nKline, D. E., R. P. Kreahling, and P. R. Blankenhorn. 1972. Dynamic mechanical properties and structure of white ash (Fraxinus americana L.) wood. Pages 185-285 in Advances in Polymer Sci. Eng., Plenum Press, New York.nMcGinnes, E. A., Jr., S. A. Kandeel, and P. S. Szopa. 1971. Some structural changes observed in the transformation of wood into charcoal. Wood Fiber 3(2):77-83.nTaylor, R. E., and D. E. Kline. 1967. Internal friction and elastic modulus behavior of vitreous carbon from 4 K to 570 K. Carbon 5:607-612.nTaylor, R. E., D. E. Kline, and P. L. Walker, Jr. 1968. The dynamic mechanical behavior of graphites. Carbon 6:333-347.n






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