Abstract
This paper describes a molecular model of yield for glassy polymers using polyethylene as the model material. The derived yield strength is simply related to fundamental molecular properties of the material. The mechanism of yield does not rely on any of the classical dislocation concepts. Instead it is shown that the yield strength of an amorphous glassy polymer should be viewed in terms of the integrity of a network of the strongest intermolecular bonds in a relatively weaker matrix. Furthermore it is shown that amorphous polymers behave in an anelastic manner as a result of their microstructure. The magnitude of the anelastic strain limit forσ=(σ y is also derived in terms of molecular quantities.
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Stachurski, Z.H. Yield strength and anelastic limit of amorphous ductile polymers. J Mater Sci 21, 3237–3242 (1986). https://doi.org/10.1007/BF00553362
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DOI: https://doi.org/10.1007/BF00553362