Determination of rates of thermal decomposition of polymerization initiators with a differential scanning calorimeter

✍ Scribed by K. E. J. Barrett

• Publisher: John Wiley and Sons
• Year: 1967
• Tongue: English
• Weight: 436 KB
• Volume: 11
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1967.070110901

✦ Synopsis

A commercial differential scanning calorimeter has been used to determine thermal and kinetic data of some typical polymerization initiators. Since the rate of heat change due to decomposition is directly related to the rate of decomposition at a given temperature, suitable analysis of the differential thermal curve can yield the Arrhenius parameters of a reaction from a single run. In order to test the method, the wellestablished first-order decomposition of ambisiibutyronitrile was determined in di-n-butyl phthalate as solvent. Reproducible multa were obtained which accorded with published data by orthodox determinations. The rates of thermal decomposition in solution of benzoyl peroxide and diisopropyl peroxydicarbonate were slso determined. The method provides a rapid means for the direct determination of fast rates not possible with orthodox analytical determinations.