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Proceedings Paper

Thermomechanical properties of shape memory polymer of polyurethane series and their applications
Author(s): Hisaaki Tobushi; Hisashi Hara; Etsuko Yamada; Shunichi Hayashi
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Paper Abstract

The thermomechanical properties of a thin film of shape memory polymer of polyurethane series were investigated experimentally. The results are summarized as follows. (1) Modulus of elasticity and yield stress are high below glass transition temperature Tg and low above Tg. The value of loss tangent is large in the vicinity of Tg. (2) The stress-strain curves vary significantly in the early cycles but slightly thereafter under cyclic deformation above Tg. (3) During the heating process after loading above Tg followed by unloading below Tg, strain recovers in the vicinity of Tg. (4) Shape fixity with loading after Tg followed by unloading below Tg does not vary under thermomechanical cycling. Several applications of the polymer are introduced.

Paper Details

Date Published: 26 April 1996
PDF: 6 pages
Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); doi: 10.1117/12.237154
Show Author Affiliations
Hisaaki Tobushi, Aichi Institute of Technology (Japan)
Hisashi Hara, Aichi Institute of Technology (Japan)
Etsuko Yamada, Aichi Institute of Technology (Japan)
Shunichi Hayashi, Mitsubishi Heavy Industries, Ltd. (Japan)


Published in SPIE Proceedings Vol. 2779:
3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials
Pierre Francois Gobin; Jacques Tatibouet, Editor(s)

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