Published 4 issues per year
ISSN Print: 2572-4258
ISSN Online: 2572-4266
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MODELING OF ANOMALOUS MECHANICAL PROPERTIES OF POLYURETHANE MODIFIED BY CARBON SINGLE-WALL NANOTUBES
ABSTRACT
The paper deals with modeling of an unusual dependence of the mechanical properties of polyurethane-urea (PAU) cross-linked elastomer containing 10 vol.% polyamide-6 (polycaprolactame) of the concentration of nanomodifier - single-wall carbon nanotubes (CNT). This elastomer picks up unusual properties after introduction of an extremely small amount of CNT. A relatively small mass fraction of nanotubes in the composite changes from zero to 0.018%. Results of the experiment show that at a mass fraction of nanoinclusions of about 0.002% a substantial and clearly defined growth of practically all mechanical characteristics, including the elasticity modulus and limiting stresses, is observed. In this case, limiting deformations change slightly. In the work, the effect of anomalous variation of the Young modulus is modeled using the gradient model of interphase layer.
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