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Segmental size of poly(ethylene terephthalate) determined by optical birefringence and ESR spin-probe method

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Abstract

The segmental size in amorphous poly(ethylene terephthalate) (PET) was determined by two methods: a) from deformational behavior of amorphous samples in the elastic state by optical birefringence measurement, and b) from dynamic behavior of a small spin probe by ESR measurement of correlation times. The use of the network model for orientation of segments in amorphous polymer and of the generalized free-volume model for re-orientation of the probe in the amorphous phase gave comparable values ofn=2.3 and 2.1 structural units/segment. We conclude that trans ⇌ gauche conformational transitions of rather small macromolecular segments are the basic motion mechanism in αa-segmental mobility in PET.

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Author notes

  1. J. Bartoš

    Present address: Polymer Institute of the Slovak Academy of Science, 842 36, Bratislava, Czechoslovakia

Authors and Affiliations

  1. Research Institute of Rubber and Plastic Technology, Zlín, Czechoslovakia

    J. Bartoš

  2. Polymer Institute of the Slovak Academy of Science, 842 36, Bratislava, Czechoslovakia

    Z. Hloušková

  3. Deutsches Kunststoff-Institute, Darmstadt, FRG

    G. Vulpius

Authors
  1. J. Bartoš
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  2. Z. Hloušková
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  3. G. Vulpius
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Bartoš, J., Hloušková, Z. & Vulpius, G. Segmental size of poly(ethylene terephthalate) determined by optical birefringence and ESR spin-probe method. Colloid Polym Sci 270, 229–233 (1992). https://doi.org/10.1007/BF00655474

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  • DOI: https://doi.org/10.1007/BF00655474

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