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Rheology pp 171-175 | Cite as

Dynamic Mechanical Properties of Thermoplastic Urethane Elastomers by Thermally Stimulated Creep

  • Talal El Sayed
  • Daniel Chatain
  • Colette Lacabanne

Abstract

In the chemistry of urethanes, major emphasis in recent years, has been placed upon efforts to develop aliphatic isocyanates to impart light stability, and improved stability toward hydrolysis (1). The first commercial aliphatic diisocyanate used was 1,6 hexamethylene diisocyanate (HDI). A series of elastomers was prepared in the melt from polyester diol (ES) -Mψ = 2,000-, from HDI and from 1,4 butane diol (BDO) for mole ratio of ES/HDI/BDO: 1/1/0, 1/2/1, 1/3/0, 1/4/3 and 1/5/4 (2). The dynamic mechanical properties of these thermoplastic urethane elastomers were investigated over the temperature range -200°C to 100°C using the Thermally Stimulated Creep (TSCr)technique (3)-. It is the purpose of this paper to investigate the molecular relaxation mechanisms of thermoplastic urethane elastomers by studying the effect of microphase segregation and intermolecular bonding on their dynamic mechanical properties.

Keywords

Hard Segment Soft Segment Dynamic Mechanical Property Hard Segment Content Hexamethylene Diisocyanate 
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 1980

Authors and Affiliations

  • Talal El Sayed
    • 1
  • Daniel Chatain
    • 1
  • Colette Lacabanne
    • 1
  1. 1.Laboratoire de Physique des SolidesUniversité Paul SabatierToulouse CédexFrance

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