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Time-Dependent Mechanical Properties of Elastomeric Block Polymers in Large Tensile Deformations

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Block Polymers

Abstract

Consideration is given to the stress-strain and ultimate tensile properties of an unplasticized and a plasticized styrene-butadiene-styrene triblock polymer at temperatures from −40 to 60°C. It is concluded that the time dependence of their mechanical properties and also their high tensile strengths result from energy dissipation associated with the plastic deformation, and eventual disruption, of the colloidal polystyrene domains. A similar mechanism is undoubtedly responsible for the high strength of segmented diisocyanate-linked (polyurethane) elastomers and also styrene-butadiene rubber vulcanizates filled with colloidal polystyrene spheres. It is further concluded that a non-crystallizable elastomer will exhibit high strength provided it contains about 25% of colloidal plastic particles, uniformly dispersed. For optimum reinforcement, the particles should deform plastically to dissipate stored elastic energy, thus relieving unfavorable stress concentrations in the vicinity of slowly growing, or incipient, cracks.

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Author information

Authors and Affiliations

  1. I.B.M. Research Laboratory, San Jose, California, 95114, USA

    Thor L. Smith

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  1. Thor L. Smith
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Editor information

Editors and Affiliations

  1. Materials Research and Technical Services Research and Development Center, The General Tire and Rubber Company, Akron, Ohio, USA

    S. L. Aggarwal (Manager) (Manager)

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© 1970 Plenum Press, New York

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Smith, T.L. (1970). Time-Dependent Mechanical Properties of Elastomeric Block Polymers in Large Tensile Deformations. In: Aggarwal, S.L. (eds) Block Polymers. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-1842-2_10

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  • DOI: https://doi.org/10.1007/978-1-4684-1842-2_10

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-1844-6

  • Online ISBN: 978-1-4684-1842-2

  • eBook Packages: Springer Book Archive

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