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Melting behaviour of low molecular weight poly (ethylene-oxide) fractions

I. Extended chain crystals

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Polymere Aspekte

Part of the book series: Progress in Colloid & Polymer Science ((PROGCOLLOID,volume 58))

Abstract

Two available theories of melting in extended chain polymer crystals are critically examined and compared with calorimetric data. Melting points, T m , and enthalpy of fusion, ΔH, have been measured for extended-chain crystals of poly(ethylene-oxide) fractions, covering a wide range of molecular weights. It appears that the theory of Flory and Vrij is the most appropriate to describe the present results and literature data. Application of this theory to experiments yields T m (∞) = (68.9 ± 0.4) °C and suggests that the value of the surface free energy, σ e , lies within 0.34 and 0.81 Kcal/mole, its enthalpic part (ΔH e /2) being (4.18 ± 0.22) Kcal/mole. Such a low value of σ e may be attributed to hydrogen bonding of OH end-groups located in the disordered surface layer of closely stacked crystalline lamellae.

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Author notes

  1. C. P. Buckley

    Present address: Department of Textile Technology, UMIST, P.o. Box 88, Manchester, U K

Authors and Affiliations

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

    C. P. Buckley & A. J. Kovacs

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  1. C. P. Buckley
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  2. A. J. Kovacs
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© 1975 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG

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Buckley, C.P., Kovacs, A.J. (1975). Melting behaviour of low molecular weight poly (ethylene-oxide) fractions. In: Polymere Aspekte. Progress in Colloid & Polymer Science, vol 58. Steinkopff. https://doi.org/10.1007/BFb0117122

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  • DOI: https://doi.org/10.1007/BFb0117122

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  • Publisher Name: Steinkopff

  • Print ISBN: 978-3-7985-1796-7

  • Online ISBN: 978-3-7985-1797-4

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