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Visualization of strain-induced structural rearrangements in amorphous poly(ethylene terephthalate)

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Abstract

A direct microscopic observation procedure is applied to study the deformation of amorphous PET decorated with a thin metal layer when stretching is performed at different draw rates and at temperatures below and above the glass transition temperature T g. Analysis of the formed microrelief allows stress fields responsible for the deformation of the polymer to be visualized and characterized. When tensile drawing is performed at temperatures above T g, inhomogeneity of stress fields increases with the increasing draw rate; at high draw rates, the stress-induced crystallization of PET takes place. In the case of drawing the polymer at temperatures below T g, direct microscopic observations make it possible to visualize the development of shear bands that appear in the unoriented part of the polymer specimen adjacent to the neck. The shear bands are oriented at an angle of about 45° with respect to the draw direction. When necking involves the unoriented part of the polymer, shear bands abruptly change their orientation and become aligned practically parallel to the draw axis.

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Authors and Affiliations

  1. Faculty of Chemistry, Moscow State University, Leninskie gory, Moscow, 119992, Russia

    A. L. Volynskii, T. E. Grokhovskaya, A. I. Kulebyakina, A. V. Bol’shakova, L. M. Yarysheva, D. A. Panchuk, A. V. Efimov & N. F. Bakeev

Authors
  1. A. L. Volynskii
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  2. T. E. Grokhovskaya
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  3. A. I. Kulebyakina
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  4. A. V. Bol’shakova
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  5. L. M. Yarysheva
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  6. D. A. Panchuk
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  7. A. V. Efimov
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  8. N. F. Bakeev
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Additional information

Original Russian Text © A.L. Volynskii, T.E. Grokhovskaya, A.I. Kulebyakina, A.V. Bol’shakova, L.M. Yarysheva, D.A. Panchuk, A.V. Efimov, N.F. Bakeev, 2006, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2006, Vol. 48, No. 5, pp. 823–833.

This work was supported by the Russian Foundation for Basic Research, project nos. 03-03-32748 and 05-03-32538.

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Volynskii, A.L., Grokhovskaya, T.E., Kulebyakina, A.I. et al. Visualization of strain-induced structural rearrangements in amorphous poly(ethylene terephthalate). Polym. Sci. Ser. A 48, 527–535 (2006). https://doi.org/10.1134/S0965545X06050105

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  • DOI: https://doi.org/10.1134/S0965545X06050105

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