ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Thermal Decomposition of Benzoyl Peroxide in Solid State
M. Lazár and P. Ambrovič
Institute of Polymers, Slovak Academy of Sciences,
Abstract: The course of decomposition reaction in different solid media has been
investigated by differential calorimetry.
The decomposition of benzojd peroxide in solid state differs from the
decomposition in solution by a notable autocatalytic effect of decomposition
reaction. The autocatalytic character of benzoyl peroxide decomposition
remains in dilute solid media, too. But the induction times are shortened
in the presence of different admixtures.
The effect of temperature on the isothermal decomposition of benzoyl
peroxide in solid medium shows that the presence of other molecules decreases
the apparent activation energy of benzoyl peroxide decomposition both
in the stage of initiation and in the stage of fast branched chain decomposition.
The results obtained are discussed and interpreted from several points
of view. The present knowledge supports the idea that the crystal lattice
of benzoyl peroxide is responsible for the rate decrease of spontaneous
decomposition in comparison with reaction rates in solutions. On the other
hand, the ordered regions of benzoyl peroxide molecules enable a fast induced
chain decomposition of peroxide. The admixtures accelerate the spontaneous
but slow down the induced decomposition of benzoyl peroxide owing to
irregularities in crystal lattice.
Full paper in Portable Document Format: 2311-12a881.pdf
Chemical Papers 23 (11-12) 881–894 (1969)