604 resultados para Tester
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National Highway Traffic Safety Administration, Washington, D.C.
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National Highway Traffic Safety Administration, Washington, D.C.
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Includes bibliographical references (p. 14).
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Mode of access: Internet.
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"11 June 1965."
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"15 November 1983."
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Description based on vol. 1.
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"October 1963."
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"30 September 1963."
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"May 1982"--Vol. 1.
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"21 September 1970."
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"June 1960."
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Includes index.
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Also issued in mimeographed form in 1936, 1937 and 1940, as U.S. Bureau of dairy industry, BDIM-699.
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The viscoelastic behaviour of a range of polyurethane thermoplastic elastomer montmorillonite nanocomposites has been studied using a nanohardness tester. For softer Shore hardness 80A materials, the introduction of the organo-clay increased the creep strain obtained while the nano-indentor was held at constant load. The increase in creep strain was greatest for materials containing an organo-clay modified with a more hydrophilic quaternary alkylammonium surfactant and with higher loadings of the hydrophilic organo-clay. This suggested the effect might be due to a plasticising effect of the excess surfactant. For the harder Shore hardness 55D materials, the addition of the organo-clays produced only a small decrease in the creep strain, probably due to the interconnected hard domains in this material.