Advertisement

Journal of thermal analysis

, Volume 30, Issue 3, pp 551–556 | Cite as

Calorimetric studies of high molecular polyethylene oxide films isothermally uniaxially stretched at room temperature

  • B. Bogdanov
  • M. Michailov
Article

Abstract

The melting behaviour of oriented polyethylene oxide (PEO) films when the film samples were heated in the free state and in the isometric state were investigated by use of DSC. It was shown that in the first case the endotherms of melting have multiple peaks, while in the other case they have one peak. Non-linear dependences of the melting temperature and enthalpy of oriented films on the pressing temperature of the initial PEO isotropic film samples were determined.

Keywords

Polymer Enthalpy Melting Temperature Oxide Film Free State 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Zusammenfassung

Das Schmelzverhalten orientierter PEO-Filme beim Erhitzen der filmproben im freien und isometrischen Zustand wurde mittels DSC untersucht. Es wurde festgestellt, daß im ersten Falle der Schmelzvorgang durch mehrere endotherme Peaks gekennzeichnet ist, während im anderen Falle nur ein endothermer Peak auftritt. Nicht-lineare Abhängigkeiten der Schmelztemperatur und — enthalpie orientierter Filme von der Temperatur, bei der die Bestimmung der ursprünglich isotropen PEO-Filme erfolgte, wurden untersucht.

Резюме

Методом ДСК исследов ано плавление ориентированных пле нок окиси полиэтилен а при нагревании их в св ободном и изометриче ском состояниях. Показано, что в первом случае эндогермы плавления имели мультиплетные пики, тогда как в изометрическом состоянии — они имели один пик. Опреде лены нелинейные зави симости температуры плавлен ия и энтальпии ориентированных пле нок от температуры пр ессования начальных изотропны х пленок окиси полиэтилена.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    O. H. Dyment, K. S. Kasanskyi and A. M. Miroshtnikov, Glycols and other derivates of ethylene- and propylene oxide, Khimiya, Moskva, 1976, p. 262 (in Russian).Google Scholar
  2. 2.
    F. H. Ancker, US pat. 3, 377, 261 (Cl. 204-159).Google Scholar
  3. 3.
    C. W. Mac Mullen, US pat. 3, 299, 566 (Cl 47-1).Google Scholar
  4. 4.
    H. Hopff and P. Jagrovic, Textil-Rundschau., 19 (1964) 517.Google Scholar
  5. 5.
    B. Bogdanov and M. Michailov, Vysokomol. Soedin., Kratk. Soobsht., 9 (1983) 666.Google Scholar
  6. 6.
    B. Bogdanov and M. Michailov, Acta Polym., 35 (1984) 469.Google Scholar
  7. 7.
    D. Goritz, F. H. Muller and W. Sietz, Progr. Colloid. and Polymer Sci., 62 (1977) 114.Google Scholar
  8. 8.
    G. M. Bartenev and Yu. Z. Zelenev, Course of Polymer Physics, Khimiya, Moskva, 1976, p. 190 (in Russian).Google Scholar
  9. 9.
    P. H. Geil, Polymer Single Crystals, Wiley, New York, 1963, p. 551.Google Scholar

Copyright information

© Wiley Heyden Ltd., Chichester and Akadémiai Kiadó, Budapest 1985

Authors and Affiliations

  • B. Bogdanov
    • 1
  • M. Michailov
    • 1
    • 2
  1. 1.Higher Institute of Chemical TechnologyBourgasBulgaria
  2. 2.Central Laboratory for PolymersBulgarian Academy of SciencesSofiaBulgaria

Personalised recommendations