Kinetic and chemical characterization of thermal decomposition of dicumylperoxide in cumene

Somma, Ilaria Di; Marotta, Raffaele; Andreozzi, Roberto; Caprio, V.

doi:10.1016/j.jhazmat.2011.01.023

Cited by 31 publications

(18 citation statements)

References 11 publications

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“…Actually, an n th ‐order model with coefficients reported in (Table ) is able to properly describe the principal peak occurring in the present experimental results (second peak occurring at higher temperature in Fig. ).…”

Section: Resultssupporting

confidence: 53%

“…In most cases, a pseudo‐first order kinetic is reported, with reaction order between 3/4 and 1 [36–40]. However DCPO decomposition kinetics was proved to be sensitive to environment : in the absence of oxygen, DCPO decomposition follows a pseudo‐first order kinetics model, whereas an autocatalytic model is more adequate in the presence of oxygen.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of dicumyl peroxide concentration on the polymerization kinetics of a polysilazane system

D׳Elia

Dusserre

Confetto

et al. 2017

Polymer Engineering & Sci

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The effect of dicumyl peroxide (DCPO) concentration on the polymerization kinetics of a polysilazane system has been investigated through DSC analyses. DCPO acts as polymerization initiator by activating the polyaddition of vinyl groups. The overall heat of reaction is found to be a linear function of the DCPO concentration above 1.5 wt%, due to the addition of the heat of fully initiated polymerization and the heat of DCPO decomposition. Below 1.5 wt% of DCPO, the polymerisation of polysilazane is not fully initiated and only part of the reaction occurs. The resulting overall heat of reaction is therefore lower than that provided by the linear law valid for higher concentrations. A two-reaction kinetic model built on this interpretation leads to a satisfactory representation of the DSC analyses performed for each DCPO concentration between 0.1 and 20 wt%. POLYM. ENG. SCI., 58:859-869, 2018.

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Section: Resultssupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Effect of dicumyl peroxide concentration on the polymerization kinetics of a polysilazane system

D׳Elia

Dusserre

Confetto

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…Combining both the decomposition products in a GC/MS and calorimetry, mechanism on the decomposition of DCPO was proposed explicitly [40]. Furthermore, a more detailed study proposed by Somma et al, [41] states that thermal decomposition of DCPO/cumene (0.6 M) under de-aerated and aerated were differentiated to be nth order and auto-catalytic behaviors, respectively. Experimental data on decomposition had been studied by an ARSST (Advanced Reactive Systems Screening Tool) and isothermal tests, thus a simple kinetic model was established for onset temperature, activation energy, and pre-exponential factor for DCPO decomposition [42].…”

Section: Dcpo (Dicumyl Peroxide)mentioning

confidence: 99%

“…These kinetic data have revealed a wide range of distributions or uncertainties without any further dynamic or microscopic interpretations. Table 6 shows the [39] experimental data of DCPO determined by this study along with literature published elsewhere [40][41][42][43].…”

Section: Dcpo (Dicumyl Peroxide)mentioning

confidence: 99%

Thermal decompositions of dialkyl peroxides studied by DSC

Duh

Lee

et al. 2014

J Therm Anal Calorim

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Studies on the thermal decompositions of diamyl peroxide (DAPO), dicumyl peroxide (DCPO), and tert-butyl cumyl peroxide (TBCP) were conducted by DSC. Heat of decomposition, exothermic onset point, and chemical kinetics were determined and compared to those data of ditert-butyl peroxide (DTBP), a model compound for studying thermokinetics of organic peroxide and standardization of a calorimeter. Similarities and differences of decomposition mechanisms between these organic peroxides were proposed and verified. Kinetics on decomposition of uni-molecular reaction via these similar alkoxyl radials accompanying b C-C bond scission were discussed and compared to the results from ab initio calculations. The ranking of thermal stability on dialkyl peroxides is determined to be in the following sequence: DCPO \ TBCP \ DAPO \ DTBP. This ratedetermining step in thermal decomposition of dialkyl peroxides possessed an average eigenvalue of log A at about 13.1 ± 1.2. Activation energy on the thermal decomposition of these peroxides was calculated to be 139.5 ± 14.4 kJ mol -1 .

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“…Studying the mechanism of photosensitized decomposition of peroxides on dry silica is a unique way to reveal information on alkoxy radical formation for potential applications. Dicumyl peroxide is fairly safe to use in low amounts based on previous reports . The present study uses physical‐organic chemistry principles along with a gas/solid technique to add insight to topics on phase separation of reactive intermediates, biological peroxides, deperoxidation and safety, and interfacial disinfection .…”

Section: Introductionmentioning

confidence: 96%

Heterogeneous photocatayltic deperoxidation with UV and visible light

Walalawela

Greer

2018

J of Physical Organic Chem

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A physical-organic study is described on the photodecomposition of dicumyl peroxide co-adsorbed with the sensitizers 4,4′-dimethylbenzil or chlorin e 6 on fumed (nonporous) silica. Dicumyl peroxide was decomposed by the heterogeneous photosensitization and monitored by the desorption of products acetophenone, 2-phenylpropan-2-ol, and α-methylstyrene using proton nuclear magnetic resonance and gas chromatography-mass spectrometry. Dicumyl peroxide and sensitizer were co-adsorbed on silica in 1:4 up to 200:1 ratios, with high peroxide destabilization occurring in ratios of about 10:1. This increased photodecomposition corresponded to sensitizer-peroxide distances of 6 to 9 Å. A Dexter triplet energy transfer mechanism is proposed that explains the short sensitizer and peroxide separation distances for higher peroxide O-O bond homolysis efficiencies on silica. This biphasic (gas/ solid) system can thus serve both to destabilize and stabilize a peroxide, which may be of practical use for the delivery of alkoxy radicals for bacterial disinfection.

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Kinetic and chemical characterization of thermal decomposition of dicumylperoxide in cumene

Cited by 31 publications

References 11 publications

Effect of dicumyl peroxide concentration on the polymerization kinetics of a polysilazane system

Effect of dicumyl peroxide concentration on the polymerization kinetics of a polysilazane system

Thermal decompositions of dialkyl peroxides studied by DSC

Heterogeneous photocatayltic deperoxidation with UV and visible light

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