Mechanical stability of elastomeric polymers for blood pump applications

K. Hayashi, H. Takano, T. Matsuda, Mitsuo Umezu

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

As a series of studies on the mechanical properties of materials used in cardiac prostheses, static and dynamic characteristics and stability of five kinds of elastomeric polymers have been studied by uniaxial tensile and fatigue tests in air at room temperature and in saline solution at 37 degree C. Of all materials tested in this study, Texin MD85A, a segmented polyether polyurethane, has the lowest flexibility under static and dynamic conditions, with relatively high strength. Hexsyn, a polyolefin rubber, is highly flexible with little stress relaxation. However, this material has very low tensile strength and short elongation, and shows unstable change in the elastic modulus during cyclic deformation. Avcothane 51, a copolymer of polyurethane and silicon, has unstable mechanical properties and gradually stiffens upon cyclic deformation. On the other hand, Biomer, a segmented polyether polyurethane, has high flexibility and shows the most stable behavior during cyclic deformation regardless of test environment. Toyobo TM5, a segmented polyurethane similar to Biomer, has higher strength and ductility than Biomer, although its static and dynamic flexibility are slightly worse and less stable than those of Biomer.

Original languageEnglish
Pages (from-to)179-193
Number of pages15
JournalJournal of Biomedical Materials Research
Volume19
Issue number2
Publication statusPublished - 1985 Feb
Externally publishedYes

Fingerprint

Polyurethanes
Mechanical stability
Polymers
Blood
Pumps
Polyethers
Mechanical properties
Rubber
Polyolefins
Stress relaxation
Silicon
Prosthetics
Sodium Chloride
Ductility
Elongation
Tensile strength
Copolymers
Elastic moduli
Fatigue of materials
biomer

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

Cite this

Mechanical stability of elastomeric polymers for blood pump applications. / Hayashi, K.; Takano, H.; Matsuda, T.; Umezu, Mitsuo.

In: Journal of Biomedical Materials Research, Vol. 19, No. 2, 02.1985, p. 179-193.

Research output: Contribution to journalArticle

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