Vol. 54 No. 02 (2004): Volume 54 Number 02, June 2004
Articles

Obtaining the Ratio of Termination Rate Constants of Poly (Methyl Methacrylate) by the Ultrasonic Scission Method

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  • Aysegül Öncül-Koç,
  • Ahmet Giz,
  • Huceste Çatalgil-Giz
Aysegül Öncül-Koç
Bahçeşehir Üniversitesi, Fen Edebiyat Fakültesi, İstanbul, Türkiye

Published 07/01/2004

Keywords

  • Termination,
  • disproportionation,
  • combination,
  • chain scission,
  • ultrasound

How to Cite

Öncül-Koç, Aysegül, Ahmet Giz, and Huceste Çatalgil-Giz. 2004. “Obtaining the Ratio of Termination Rate Constants of Poly (Methyl Methacrylate) by the Ultrasonic Scission Method”. ITU ARI Bulletin of Istanbul Technical University 54 (02):6-11. https://ari.itu.edu.tr/index.php/ituari/article/view/47.

Copyright (c) 2003 ITU Press

Creative Commons License

This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.

Abstract

The termination step in radical polymerization occurs either by combination or by disproportionation. The termination mechanism of poly (methyl methacrylate) in sonochemical environment is studied by the ultrasonic scission method. The method is improved to give quantitative results by incorporating non-linear least squares analysis of the data. The Chi square map obtained by fitting the data to Schmid's equation gives the ratio of the rate constants for termination by disproportionation and by combination as ktd/ktc = 2.6 ± 0.4.
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