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High Modulus Isocyanurate-Urethane RIM Elastomers

  • J. E. Kresta
  • K. H. Hsieh
  • C. L. Wang
Part of the Polymer Science and Technology book series (POLS, volume 18)

Abstract

Urethane elastomers are segmented block copolymers composed of polyether or polyester soft segments which are connected with the urethane hard segments, formed from diisocyanates and low molecular weight diols or diamines (chain extenders). The segments are incompatible at lower temperatures and therefore, microphase separation proceeds with the formation of soft and hard segment domains. The mechanical properties depend strongly on the phase structure, the content of the hard segments in elastomers, on the molecular weight, distribution and functionality of the soft segments. The degree of phase separation, the size of domains and crystallization play an important morphological role affecting overall properties of urethane elastomers.1–6

Keywords

Hard Segment Soft Segment Chain Extender Flexural Modulus Hard Segment Content 
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.

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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • J. E. Kresta
    • 1
  • K. H. Hsieh
    • 1
  • C. L. Wang
    • 1
  1. 1.Polymer InstituteUniversity of DetroitDetroitUSA

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