ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Comparison of isothermal and non-isothermal chemiluminescence and differential scanning calorimetry experiments with benzoyl peroxide

Jozef Rychlý, Aysegul Kocer, Fathy Tanis, Lyda Matisová-Rychlá, Ivica Janigová, and Katarína Csomorová

Polymer Institute, Slovak Academy of Sciences, 842 36 Bratislava, Slovakia

E-mail: upoljory@savba.sk

Received: 22 May 2008  Revised: 3 November 2008  Accepted: 13 November 2008

Abstract: Difference in the kinetics of chemiluminescence (CL) and differential scanning calorimetry records for decomposition of originally solid benzoyl peroxide continuing as a melt reaction was outlined. While the main portion of heat measured by DSC is released in the spontaneous decomposition of benzoyl peroxide starting as a homolytic scission of peroxidic bonds, the CL light emission in oxygen comes presumably from the subsequent disproportionation reaction of polyphenyl peroxyl radicals and monitors the induced decomposition of peroxide. Thermogravimetry revealed that oxygen remains partially bound to the products of benzoyl peroxide decomposition.

Keywords: benzoyl peroxide - free radical decomposition - chemiluminescence - differential scanning calorimetry - thermogravimetry

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-009-0021-y

Chemical Papers 63 (4) 471–478 (2009)