Strength and Fracture Toughness of Polyurethane Elastomers Modified with Carbon Nanotubes

Very small additions of single-wall carbon nanotubes produce an anomalous change in the mechanical properties of a cross-linked polyurethane-amide-urea elastomer containing 10% of polyamide-6: its elastic modulus and ultimate stress reveal local maxima at a nanofiller content of hundredths and thous...

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Bibliographic Details
Published in:Physical mesomechanics 2018-05, Vol.21 (3), p.187-192
Main Authors: Badamshina, E. R., Goldstein, R. V., Ustinov, K. B., Estrin, Ya. I.
Format: Article
Language:English
Subjects:
Classical Mechanics
Computer simulation
Crosslinking
Elastomers
Fracture toughness
Materials Science
Mechanical properties
Modulus of elasticity
Nanotubes
Physics
Physics and Astronomy
Polyamide resins
Polyurethane resins
Single wall carbon nanotubes
Solid State Physics
Tensile stress
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Summary:Very small additions of single-wall carbon nanotubes produce an anomalous change in the mechanical properties of a cross-linked polyurethane-amide-urea elastomer containing 10% of polyamide-6: its elastic modulus and ultimate stress reveal local maxima at a nanofiller content of hundredths and thousandths of a percent. Previously, the behavior of the elastic modulus was simulated reasoning from the formation of an intermediate phase layer in the elastomer at particle contact boundaries. Here, on the same basis, we simulate the behavior of its strength as a function of nanotube concentration and consider crack models accounting for the influence of nanotubes on the crack tip zone and fracture toughness.
ISSN:1029-9599
1990-5424
DOI:10.1134/S1029959918030013