Advertisement

Journal of Thermal Analysis and Calorimetry

, Volume 57, Issue 2, pp 459–472 | Cite as

Temperature-modulated Calorimetry of the Crystallization of Polymers Analyzed by Measurements and Model Calculations

  • M. L. Di Lorenzo
  • B. Wunderlich
Article

Abstract

The response of temperature-modulated differential scanning calorimetry (TMDSC) to irreversible crystallization of linear polymers was investigated by model calculations and compared to a number of measurements. Four different exotherms were added to a typical modulated, reversible heat-flow rate in order to simulate irreversible crystallization. It was found that the reversing heat-flow rate of the TMDSC in response to such irreversible crystallization exotherms is strongly affected by tbe shape of the transition and the phase-angle where the exotherm occurs. A comparison with the experimental data gave valuable insight into the transitions, as well as the nature of the TMDSC response which is usually limited to an analysis of the first harmonic term of the Fourier series that describes the heat-flow rate.

crystallization heat capacity heat-flow rate temperature-modulated calorimetry 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    I. Okazaki and B. Wunderlich, Macromol. Chem., Rapid Commun., 18 (1997) 313.Google Scholar
  2. 2.
    I. Okazaki and B. Wunderlich, Macromolecules, 30 (1997) 1758.Google Scholar
  3. 3.
    M. Pyda, A. Boller, J. Grebowicz, H. Chuah and B. Wunderlich, J. Polymer Sci., Part B: Polymer Phys., 36 (1998) 2499; see also Proc. 25th NATAS Conf. in McLean, Va., Sept. 7–9, R. G. Morgan ed., (1997) 87.Google Scholar
  4. 4.
    K. Ishikiriyama, M. Pyda, G. Zhang, T. Forschner, J. Grebowicz and B. Wunderlich, J. Macromol. Sci.-Phys., B37 (1997) 27.Google Scholar
  5. 5.
    A. Wurm, M. Merzlyakov and C. Schick, submitted for publication in Coll. Polym. Sci.Google Scholar
  6. 6.
    K. Ishikiriyama and B. Wunderlich, Macromolecules, 30 (1997) 4126.Google Scholar
  7. 7.
    B. Wunderlich, Disc. Farad. Soc., 68 (1979) 239.Google Scholar
  8. 8.
    B. Wunderlich and A. Mehta, J. Polym. Sci., Polymer Phys. Ed., 12 (1979) 255.Google Scholar
  9. 9.
    K. Ishikiriyama and B. Wunderlich, J. Polymer Sci., Part B, Polymer Phys., 35 (1997) 1877.Google Scholar
  10. 10.
    A. Toda, C. Tomita, T. Oda, M, Hikosaka and Y. Saruyama, Proc. 25th NATAS Conf. in McLean, Va., Sept. 7–9, R. G. Morgan ed., (1997) 645.Google Scholar
  11. 11.
    B. Wunderlich, A. Boller, I. Okazaki, K. Ishikiriyama, W. Chen, M. Pyda, J. Pak, I. Moon and R. Androsch, accepted for publication in Thermochim. Acta.Google Scholar
  12. 12.
    B. Wunderlich, J. Thermal Anal., 48 (1997) 207.Google Scholar
  13. 13.
    B. Wunderlich and I. Okazaki, J. Thermal Anal., 49 (1997) 57.Google Scholar
  14. 14.
    L. C. Thomas, A. Boller, I. Okazaki and B. Wunderlich, Thermochim. Acta, 291 (1997) 85.Google Scholar
  15. 15.
    B. Wunderlich, I. Okazaki, K. Ishikiriyama and A. Boller, Thermochim. Acta, 324 (1998) 77.; see also Proc. 25th NATAS Conf. in McLean, Va., Sept. 7–9, R. G. Morgan, ed. (1997) 49.Google Scholar
  16. 16.
    R. Androsch, I. Moon, S. Kreitmeier and B. Wunderlich, Thermochim. Acta, accepted for publication in (1999).Google Scholar
  17. 17.
    M. L. Di Lorenzo, R. Androsch, M. Pyda and B. Wunderlich, in preparation.Google Scholar
  18. 18.
    C. Silvestre, S. Cimmino, E. D'Alma, M. L. Di Lorenzo and E. Di Pace, accepted for publication in Polymer.Google Scholar
  19. 19.
    The ATHAS Web-site URL: http://web.utk.edu/~athas.Google Scholar
  20. 20.
    B. Wunderlich, Y. Jin and A. Boller, Thermochim. Acta, 238 (1994) 277.Google Scholar
  21. 21.
    M. L. Di Lorenzo and B. Wunderlich, unpublished data.Google Scholar
  22. 22.
    Mettler Toledo Stare software, Version 5.0, Mettler Toledo GmbH, Analytical Sonnenberg-strasse 74, CH-8603 Schwerzenbach, Switzerland.Google Scholar

Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • M. L. Di Lorenzo
    • 1
  • B. Wunderlich
    • 1
    • 2
  1. 1.Department of ChemistryUniversity of TennesseeKnoxville
  2. 2.Division of Analytical and Chemical SciencesOak Ridge National LaboratoryOak RidgeUSA

Personalised recommendations