Skip to main content
SpringerLink
Log in

The use of DSC to characterize structural relaxation in thermosetting polymers

  • Polymers
  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

Structural relaxation in different epoxy-anhydride and epoxy-diamine resins has been investigated by differential scanning calorimetry using annealing and cooling rate experiments. The annealing experiments lead to the determination of enthalpy loss,δH, at an equivalent annealing temperatureT a=T g-20, and for periods of annealing time, ta, between 1 h and 4 months. The variation ofδH with logta, defines a relaxation rate per decade,rrpd, which is very sensitive to changes of the epoxy network. The cooling rate experiments allow the determination of the apparent activation energy,δh *. The effect of the degree of crosslinking, the addition of a reactive diluent, which acts as flexibilizer, and the length of cross-link onrrpd and δh* was studied.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. G. B. McKenna, Comprehensive Polymer Science, Vol. 2. Polymer Properties, C. Booth and C. Price (Eds), Pergamon, Oxford 1989, Chap. 10.

    Google Scholar 

  2. L. C. E. Struik, Physical Aging in Amorphous Polymers and other Materials, Elsevier, Amsterdam 1978.

    Google Scholar 

  3. J. M. Hutchinson, Prog. Polym. Sci., 20 (1995) 703.

    Article  CAS  Google Scholar 

  4. I. M. Hodge, J.Non-Cryst. Solids, 169 (1994) 211.

    Article  CAS  Google Scholar 

  5. S. Montserrat, P. Cortés and J. M. Hutchinson, J. Non-Cryst. Solids, 172-174 (1994) 1017.

    Article  CAS  Google Scholar 

  6. J. M. Hutchinson, D. McCarthy, S. Montserrat and P. Cortés, J. Polym. Sci., Polym. Phys., 34 (1996) 229.

    Article  CAS  Google Scholar 

  7. S. Montserrat, J. Appl. Polym. Sci., 44 (1992) 545.

    Article  CAS  Google Scholar 

  8. S. Montserrat, G. Andreu, P. Cortés, Y. Calventus, P. Colomer, J. M. Hutchinson and J. Málek, J. Appl. Polym. Sci., 61 (1996) 1663.

    Article  CAS  Google Scholar 

  9. S. Montserrat, J. Polym. Sci., Polym. Phys., 32 (1994) 509.

    Article  CAS  Google Scholar 

  10. A. Q. Tool, J. Amer. Ceram. Soc., 29 (1946) 240.

    Article  CAS  Google Scholar 

  11. C. T. Moynihan, A. J. Easteal, M. A. DeBolt and J. Tucker, J. Amer. Ceram. Soc., 59 (1976) 12.

    Article  CAS  Google Scholar 

Download references

Author information

Author notes

  1. S. Montserrat

    Present address: Departament de Màquines i Motors Tèrmics, E.T.S.E.I.T., Universitat Politècnica de Catalunya, Colom 11, E-08222, Terrassa, Spain

  2. J. M. Hutchinson

    Present address: Department of Engineering, Aberdeen University, AB9 2UE, Aberdeen, Scotland, UK

Authors and Affiliations

  1. Departament de Màquines i Motors Tèrmics, E.T.S.E.I.T., Universitat Politècnica de Catalunya, Colom 11, E-08222, Terrassa, Spain

    P. Cortés, Y. Calventus & J. M. Hutchinson

Authors
  1. S. Montserrat
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. P. Cortés
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Y. Calventus
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. J. M. Hutchinson
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Financial support has been provided by DGICYT (Project no.PB93/1241). The authors are grateful to CIBA-GEIGY for supplying the epoxies and hardeners, and to HUNTSMAN CORPORATION EUROPE for supplying the JEFFAMINE*, J.M.H. wishes to acknowledge assistance for a sabbatical period from theMinisterio de Education y Ciencia.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Montserrat, S., Cortés, P., Calventus, Y. et al. The use of DSC to characterize structural relaxation in thermosetting polymers. Journal of Thermal Analysis 49, 79–85 (1997). https://doi.org/10.1007/BF01987423

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01987423

Keywords

Search

Navigation