Thermogravimetric Analysis of Polymethylmethacrylate and Polytetrafluoroethylene

  • James A. Currie
  • N. Pathmanand


Kinetics is of fundamental importance in the understanding of the mechanism of thermal decomposition of high polymers. Since most thermal decomposition reactions are associated with weight changes, thermogravimetry is being employed to a great degree in kinetic studies of polymer decomposition. Two approaches are commonly used to obtain the various kinetic Chapaumeters of these reactions. The static method or “isothermal thermogravimetry” produces precise weight loss curves for various single temperatures as a function of time. Thus the rate Chapaumeters are obtained directly. This method is inherently time consuming and the results are sometimes questionable due to experimental uncertainities arising from the initial thermal lag of the sample. More recently, “dynamic thermogravimetry” data has been used for kinetic studies. In these, a single weight loss curve obtained by means of programmed heating is used to provide information equivalent to an entire family of isothermal weight loss curves. The new approach is time saving, being able to cover a wide range of temperatures in a relatively short time. For this work the kinetics evaluation procedure by Freeman and Carroll1 and its extension by Anderson and Freeman2, is applied to dynamic thermogravimetric data in order to evaluate the rate Chapaumeters.


Activation Energy Heating Rate Thermal Decomposition Atmosphere Pressure Inert Atmosphere 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Freeman E. S. and B. Carroll, J. Phys. Chem., 62, 394 (1958)CrossRefGoogle Scholar
  2. 2.
    Anderson D. A. and E. S. Freeman, J. Polymer Sci., 54, 253 (1961)CrossRefGoogle Scholar
  3. 3.
    Doyle C. D., J. Appl. Polymer Sci., 5, 285 (1961)CrossRefGoogle Scholar
  4. 4.
    Coats, A. W. and J. P. Redfern, Polymer Letters, 3, 917 (1965)CrossRefGoogle Scholar
  5. 5.
    Horowitz, H. H. and Metzger, Anal. Chem., 35, 1464 (1963)CrossRefGoogle Scholar
  6. 6.
    Reich, L. and Levi, D. W., Makromol Chemie., 66, 102 (1963)CrossRefGoogle Scholar
  7. 7.
    Flynn, J. H. and Wall, L. A., Polymer Letters, 4, 323 (1966)CrossRefGoogle Scholar
  8. 8.
    Freidman, H. L., J. Polymer Sci., C, 6, 183 (1965)CrossRefGoogle Scholar
  9. 9.
    Chatterjee, P. K., J. Polymer Sci., A, 3, 4253 (1965)Google Scholar
  10. 10.
    Reich, L., Lee, H. T. and Levi, D. W., Polymer Letters, 1, 535 (1963)CrossRefGoogle Scholar
  11. 11.
    Wall, L. A. and Michaelson, J. D., J. Res. N.B.S., 56, 27 (1956)Google Scholar
  12. 12.
    Duus, H. C., DuPont Co., presented at A.C.S., Sept., 1964, N. Y.Google Scholar
  13. 13.
    Madorsky, S. L., J. Polymer Sci., 11, 491 (1953)CrossRefGoogle Scholar
  14. 14.
    Bywater, S., J. Phys. Chem., 57, 879 (1953)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • James A. Currie
    • 1
  • N. Pathmanand
    • 1
  1. 1.Villanova UniversityVillanovaUSA

Personalised recommendations