Skip to main content
SpringerLink
Log in
Book cover

Challenges In Mechanics of Time-Dependent Materials and Processes in Conventional and Multifunctional Materials, Volume 2 pp 17–20Cite as

The Effect of Stoichiometric Ratio on Viscoelastic Properties of Polyurea

  • Conference paper
  • First Online:

  • 1086 Accesses

Abstract

Polyurea is a commonly utilized elastomer due to its excellent thermo-mechanical properties. In this study, the polyurea is synthesized using Versalink P-1000 (Air Products) and Isonate 143 L (Dow Chemicals). The diisocynate blocks generally assemble into hard domains embedded in the soft matrix, creating a lightly cross-linked heterogenous nano-structure. We seek to evaluate the effect of the stoichiometric ratio of the two components on the viscoelastic properties of the resultant polyurea. By altering the ratio, polyurea samples with different stoichiometric variations are made. In order to approximate the mechanical properties of polyurea for a wide frequency range, master curves of storage and loss moduli are developed. This is achieved by time-temperature superposition of the dynamic mechanical analysis (DMA) data, which is conducted at low frequencies and at temperatures as low as the glass transition. Furthermore, in order to access the effect of the stoichiometric ratio on the relaxation mechanisms in the polyurea copolymer system, continuous relaxation spectra of all the stoichiometric variations are calculated and compared.

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

Chapter
USD   29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD   169.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD   219.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD   219.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Learn about institutional subscriptions

References

  1. Air Product Chemicals, Inc (2003) Polyurethance specialty products, Air Products and Chemicals, Allentown

    Google Scholar 

  2. The Dow Chemical Company (2001) Isonate 143L, Modified MDI, Dow Chemical, Midland

    Google Scholar 

  3. May-Hernández L, Hernandez-Sanchez F, Gomez-Ribelles J, Sabater-i Serra R (2011) Segmented poly (urethane-urea) elastomers based on polycaprolactone: structure and properties. J Appl Polym Sci 119:2093–2104

    Article  Google Scholar 

  4. Fragiadakis D, Gamache R, Bogoslovov RB, Roland CM (2010) Segmental dynamics of polyurea: effect of stoichiometry. Polymer 51(1):178–184

    Article  Google Scholar 

  5. Ferry JD (1980) Viscoelastic properties of polymers. Wiley, New York

    Google Scholar 

  6. Knauss WG, Zhu W (2002) Nonlinearly viscoelastic behavior of polycarbonate. I. Response under pure shear. Mech Time-Depend Mater 6:231–269

    Article  Google Scholar 

  7. Ferry JD, Williams ML (1952) Second approximation methods for determining the relaxation time spectrum of a viscoelastic material. Relax Spectr Viscoelastic Mater 347–353

    Google Scholar 

  8. Williams ML, Ferry JD (1952) Second approximation calculations of mechanical and electrical relaxation and retardation distributions. J Polym Sci XI(2):169–175

    Google Scholar 

  9. Holzworth K, Jia Z, Amirkhizi AV, Qiao J, Nemat-Nasser S Effect of isocyanate content on thermal and mechanical properties of polyurea. Polym Under Rev

    Google Scholar 

Download references

Acknowledgement

This work has been supported by the Office of Naval Research (ONR) grant N00014-09-1-1126 to the University of California, San Diego.

Author information

Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, Center of Excellence for Advanced Materials, University of California, 9500 Gilman Drive, La Jolla, 92093-0416, San Diego, CA, USA

    Zhanzhan Jia, Alireza V. Amirkhizi, Kristin Holzworth & Sia Nemat-Nasser

Authors
  1. Zhanzhan Jia
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Alireza V. Amirkhizi
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Kristin Holzworth
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Sia Nemat-Nasser
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Zhanzhan Jia .

Editor information

Editors and Affiliations

  1. Sandia National Laboratories, Livermore, California, USA

    Bonnie Antoun

  2. University of Colorado, Boulder, USA

    H. Jerry Qi

  3. Air Force Research Laboratory, Wright-Patterson AFB, Ohio, USA

    Richard Hall

  4. University of Dayton Research Institute, Dayton, Ohio, USA

    G P Tandon

  5. University of Texas-Dallas, Dallas, USA

    Hongbing Lu

  6. University of Kentucky, Paducah, USA

    Charles Lu

  7. Los Alamos National Laboratory, Los Alamos, New Mexico, USA

    Jevan Furmanski

  8. University California San Diego, La Jolla, California, USA

    Alireza Amirkhizi

Rights and permissions

Reprints and permissions

Copyright information

© 2014 The Society for Experimental Mechanics, Inc.

About this paper

Cite this paper

Jia, Z., Amirkhizi, A.V., Holzworth, K., Nemat-Nasser, S. (2014). The Effect of Stoichiometric Ratio on Viscoelastic Properties of Polyurea. In: Antoun, B., et al. Challenges In Mechanics of Time-Dependent Materials and Processes in Conventional and Multifunctional Materials, Volume 2. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00852-3_3

Download citation

  • DOI: https://doi.org/10.1007/978-3-319-00852-3_3

  • Published:

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-00851-6

  • Online ISBN: 978-3-319-00852-3

  • eBook Packages: EngineeringEngineering (R0)

Publish with us

Policies and ethics

Search

Navigation