Abstract
The stress-strain diagrams of amorphous linear polymers oriented under different conditions are examined; a comparison is made with the parameters of their internal structure. It is shown that the shape of the diagram for rigid polymers is basically determined by the degree of orientation of the links of the macromolecules irrespective of the molecular weight of the polymer and the extension conditions. It is established that the moment of failure can not be determined from this parameter alone. It is found that when the oriented polymer is tested close to the softening point the correlation between the shape of the diagram and the birefringence, characterizing the degree of orientation of the links of the macromolecules, is disturbed.
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Mekhanika Polimerov, Vol. 2, No. 3, pp. 435–439, 1966
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Laius, L.A., Kuvshinskii, E.V. Birefringence and stress-strain diagrams for oriented atactic polymethyl methacrylate and polystyrene films. Polymer Mechanics 2, 272–274 (1966). https://doi.org/10.1007/BF00860299
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DOI: https://doi.org/10.1007/BF00860299