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Nascent structures during the polymerization of ethylene

II. Calorimetric study

  • Original Contributions
  • Polymer Science
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Summary

The thermal behaviour of nascent or “as grown” polyethylene was studied. The analysis of the melting curves of various high molecular weight samples show that the maximum melting points are usually sharper and higher than those corresponding to samples crystallized from the melt or solution in absence of external deformation. The melting points increase with polymerization time and reach at least 412 °K (139 °C) for samples polymerized for few minutes. This usually goes along with the appearance of a higher submaximum around 415°K (142°C) which corresponds to extended chain crystalline material having superheating properties. Such features are explained in terms of a scheme where continuous deformation is operative during polymerization and crystallization of the nascent samples.

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Author information

Authors and Affiliations

  1. Centre de Recherches sur les Macromolécules Végétales C.N.R.S., Grenoble, France

    H. D. Chanzy,  E. Bonjour &  R. H. Marchessault

  2. S.B.T., Centre d'Etudes Nucléaires de Grenoble, Grenoble, France

    H. D. Chanzy,  E. Bonjour &  R. H. Marchessault

  3. Département de Chimie, Université de Montreal, Montreal, Canada

    H. D. Chanzy,  E. Bonjour &  R. H. Marchessault

Authors
  1. H. D. Chanzy
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  2. E. Bonjour
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  3. R. H. Marchessault
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Additional information

Taken in part from the “Thèse de Doctorat” of H. D. Chanzy, CNRS registration number A.O. 3296 (1970). Part I of this series is ref. (4) in this paper.

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Chanzy, H.D., Bonjour, E. & Marchessault, R.H. Nascent structures during the polymerization of ethylene. Colloid & Polymer Sci 252, 8–14 (1974). https://doi.org/10.1007/BF01381688

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  • DOI: https://doi.org/10.1007/BF01381688

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