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Journal of thermal analysis

, Volume 35, Issue 1, pp 77–90 | Cite as

Non-isothermal thermogravimetry of polymer

I. General model involving formal termination of active centres
  • J. Rychlý
  • L. Rychlá
Article

Abstract

A Model of polymer decomposition is proposed which formally involves the termination of active centres. It yields reasonable activation energies for the decompositions of polypropylene, polyethylene, polystyrene and polymethyl methacrylate investigated by non-isothermal thermogravimetry. In the value of a formal reaction orders the model reflects the reaction conditions, such as initial sample weight, atmosphere, ventilation conditions, sample holder nature and shape, etc.

Keywords

Activation Energy Polystyrene Polypropylene Methacrylate Polymethyl Methacrylate 
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

Ein Modell für Zersetzungsreaktionen von Polymeren wurde entworfen, das auf dem Abbau von aktiven Zentren basiert. Es liefert richtige Aktivierungsenergien für die Zersetzung von Polypropylen, Polyäthylen, Polystyren und Polymethylmethakrylat (bestimmt durch nichtisotherme Thermogravimetrie) und macht es ausserdem möglich, die „äusseren“ Reaktionsbedingungen, wie Einwaage, Atmosphäre, Ventillationsbedingungen, Art und Form des Probenhalters usw. zu berücksichtigen.

Резюме

Предложена модель ра зложения полимера, которая формально вк лючает обрыв активных центров. Так ая модель дает возмож ность получать приемлемые энергии активации реакций разложения п олиэтилена, полипроп илена, полистирола и полиме тилметакрилата, изученных неизотерм ической термогравим етрией. Предложенная модель допускает включение таких «внешних» усло вий реакций, как начал ьный вес образца, атмосферы, ус ловий продувки, характера и формы дер жателя образца и т. п.

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Copyright information

© Wiley Heyden Ltd, Chichester and Akadémiai Kiadó, Budapest 1988

Authors and Affiliations

  • J. Rychlý
    • 1
  • L. Rychlá
    • 1
  1. 1.Polymer Institute, Centre of Chemical ResearchSlovak Academy of SciencesBratislavaCzechoslovakia

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