Influence of Domain Structure on The Mechanical Properties of Thermoplastic Polyurethane Materials

The tensile deformation of thermoplastic polyurethanes (TPUs) with varying sizes of hard domain was investigated to produce a new form of constitutive equation. The equation is expressed using the plastic component of the deformation of the hard domains and a network component based on van der Waals...

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Bibliographic Details
Published in:E-journal of soft materials 2011/12/30, Vol.7, pp.8-14
Main Authors: Sunada, Tomoe, Kuriyagawa, Mizue, Kawamura, Takanobu, Nitta, Koh-hei
Format: Article
Language:English
Subjects:
Constitutive equation
Electronic publishing
Mathematical analysis
Morphology
Networks
Polyurethane
Polyurethane resins
Stress-strain relationships
Stresses
Tensile properties
Thermoplastic resins
Urethane thermoplastic elastomers
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Summary:The tensile deformation of thermoplastic polyurethanes (TPUs) with varying sizes of hard domain was investigated to produce a new form of constitutive equation. The equation is expressed using the plastic component of the deformation of the hard domains and a network component based on van der Waals' equation. A TPU formulation with a large hard domain shows a higher stress level and higher stress-strain gradient. It was found that the stress level is dominated by the plastic component, resulting from the stiffness of the hard domains and the stress gradient is determined by the network component, resulting from the extension of the soft segment chains between the hard domains.
ISSN:1349-7308
1349-7308
DOI:10.2324/ejsm.7.8