The thermal decomposition of dibenzoyl and di-?-cumyl peroxides in cumene

Bailey, H. C.; Godin, Guillaume

doi:10.1039/tf9565200068

Cited by 58 publications

(25 citation statements)

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“…This is in agreement with literature data, which has demonstrated that higher temperatures favoured the β-scission reaction to ketones [27]. Thus, for higher yields of ketones, the process must be carried out at 110°C.…”

Section: 6-bis(1-hydroperoxy-1-methylethyl)naphthalene 44'-bis(1-hsupporting

confidence: 81%

Copper (II) chloride / tetrabutylammonium bromide catalyzed oxidation of 2,6-diisopropylnaphthalene and 4,4′-diisopropylbiphenyl

Orlińska

Zawadiak

2010

Open Chemistry

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Abstract:The oxidation processes of 2,6-diisopropylnaphthalene and 4,4'-diisopropylbiphenyl with oxygen in the presence of a catalyst, composed of copper(II) chloride and tetrabutylammonium bromide, were investigated. It was found that, in essence, only one isopropyl group undergoes oxidation, and obtained mixtures contained mainly peroxide, alcohol, ketone and only small amounts of hydroperoxide. © Versita Sp. z o.o.

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Section: 6-bis(1-hydroperoxy-1-methylethyl)naphthalene 44'-bis(1-hsupporting

confidence: 81%

Copper (II) chloride / tetrabutylammonium bromide catalyzed oxidation of 2,6-diisopropylnaphthalene and 4,4′-diisopropylbiphenyl

Orlińska

Zawadiak

2010

Open Chemistry

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“…Both studies proposed to describe the decomposition rate of DCP by means of an nth-order kinetic with Arrhenius dependence on the temperature. The same type of kinetic expression was proposed in an older paper by Bailey and Godin [7] for the thermal decomposition of DCP in de-aerated cumene. The kinetic parameters reported in these three papers [5][6][7] suggest a dependence of the thermal decomposition rate of DCP on the employed solvent and/or the presence of oxygen.…”

Section: Introductionmentioning

confidence: 70%

“…The same type of kinetic expression was proposed in an older paper by Bailey and Godin [7] for the thermal decomposition of DCP in de-aerated cumene. The kinetic parameters reported in these three papers [5][6][7] suggest a dependence of the thermal decomposition rate of DCP on the employed solvent and/or the presence of oxygen. However, it is important to stress that indications about the uncertainty of the estimated kinetic parameters are only provided in [6] for the DCP decomposition in aerated solutions of ethylbenzene.…”

Section: Introductionmentioning

confidence: 70%

Kinetic and chemical characterization of thermal decomposition of dicumylperoxide in cumene

Somma

Marotta

Andreozzi

et al. 2011

Journal of Hazardous Materials

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“…That is the reason why, in a first approach, the value of a was estimated from spectrochemical data on the thermal decomposition of DCP in cumene at moderate temperature. 38 The extrapolation of these data to 170 8C by a linear regression gave a/(1 -a) ¼ 2.22, which led finally to a ¼ 0.69 (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

PEROXIDE CROSS-LINKING OF EPDMs HAVING HIGH FRACTIONS OF ETHYLENIC UNITS

Shabani

Colin

Marque

et al. 2014

Rubber Chemistry and Technology

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. ABSTRACTThe considerable amount of research in the literature has practically allowed the elucidation of the mechanism of peroxide cross-linking of ethylene-propylene-diene-monomer rubber (EPDM), which occurs through a radical chain reaction initiated by the thermal decomposition of the peroxide molecule. According to this radical chain reaction, all types of labile hydrocarbon bonds (i.e., allylic, methynic, and methylenic CH bonds) would be exposed to alkoxy radicals and involved in the formation of the elastomeric network. However, for high fractions of ethylenic units (typically !60 mol.%), simple chemical kinetics and thermochemical analyses have shown that the radical attack would essentially occur on the methylenic CH bonds. Starting from this assertion, a simplified mechanistic scheme has been proposed for the three commercial EPDMs under study. The corresponding kinetic model, derived from this new scheme by using the basic concepts of the chemical kinetics, provides access to the changes in concentration of the main reactive chemical functions (against exposure time), among which are double bonds and changes in cross-linking density. The validity of these predictions has been eventually successfully verified by five distinct analytical techniques frequently used for studying the cross-linking of rubbers.

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The thermal decomposition of dibenzoyl and di-?-cumyl peroxides in cumene

Cited by 58 publications

References 0 publications

Copper (II) chloride / tetrabutylammonium bromide catalyzed oxidation of 2,6-diisopropylnaphthalene and 4,4′-diisopropylbiphenyl

Copper (II) chloride / tetrabutylammonium bromide catalyzed oxidation of 2,6-diisopropylnaphthalene and 4,4′-diisopropylbiphenyl

Kinetic and chemical characterization of thermal decomposition of dicumylperoxide in cumene

PEROXIDE CROSS-LINKING OF EPDMs HAVING HIGH FRACTIONS OF ETHYLENIC UNITS

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