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- W2035932279 abstract "The time of expectation for breakdown (life-time, τ) was measured as a function of temperature (T) and tensile stress (σ) for a variety of polymers, including nylon-6, polyethylene, poly(ethylene terephthalate) and poly(tetrafluoroethylene). At moderate temperatures (above ∼200 K), the τ(1/T)σ dependences are exponential (of the Boltzmann-Frenkel type). The elementary acts of polymer fracture occur at these temperatures through the thermal-fluctuation above-barrier transitions. At low temperatures (below ∼200 K), τ is T-independent (an athermic plateau) and, therefore, the above-barrier mechanism is ruled out. It is concluded that the elementary acts of fracture proceed at low temperatures via the tunnel below-barrier mechanism. Possible types of tunnel processes (tunneling of atoms or electrons) are discussed." @default.
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- W2035932279 date "1991-02-01" @default.
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- W2035932279 title "Kinetics of polymer failure at moderate and low temperatures" @default.
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- W2035932279 doi "https://doi.org/10.1002/masy.19910410110" @default.
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