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Changes in crystallite size distribution during the isothermal crystallization of linear polyethylene

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Summary

Changes in the crystallite size distribution during the isothermal crystallization of linear polyethylene fractions were studied using low frequency Raman spectroscopy (LAM). Increases in the crystallite size and broadening distributions were observed as a function of time for all molecular weights studied. Large increases in size occurred even after most of the isothermal crystallinity had formed. The rate of increase was faster for higher crystallization temperatures, while the process was retarded for the higher molecular weights. Similar results were obtained for an unfractionated polymer except for complications that are likely due to molecular weight fractionation.

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Authors and Affiliations

  1. Institute of Molecular Biophysics, Florida State University, 32306, Tallahassee, FL, USA

    G. M. Stack, L. Mandelkern & I. G. Voigt-Martin

  2. Institut für Physikalische Chemie, Johannes-Gutenberg-Universität, D-6500, Mainz, Federal Republic of Germany

    G. M. Stack, L. Mandelkern & I. G. Voigt-Martin

Authors
  1. G. M. Stack
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  2. L. Mandelkern
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  3. I. G. Voigt-Martin
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Stack, G.M., Mandelkern, L. & Voigt-Martin, I.G. Changes in crystallite size distribution during the isothermal crystallization of linear polyethylene. Polymer Bulletin 8, 421–428 (1982). https://doi.org/10.1007/BF00265262

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  • DOI: https://doi.org/10.1007/BF00265262

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