Catalyst benzoyl peroxide

I Initiation The polymerization reaction is initiated when a few radicals are generated on heating a small amount of benzoyl peroxide catalyst to break the weak 0-0 bond. A benzoyloxy radical then adds to the C=C bond of ethylene to generate a carbon radical. One electron from the C=C bond pairs up with the odd electron on the benzoyloxy radical to form a C-O bond, and the other election remains on carbon. 

Cyclohexanol and cyclohexanone are made by the air oxidation of cyclohexane (81%) with a cobalt(II) naphthenate or acetate or benzoyl peroxide catalyst at 125-160°C and 50-250 psi. Also used in the manufacture of this mixture is the hydrogenation of phenol at elevated temperatures and pressures, in either the liquid or vapor phase (19%). The ratio of alcohol to ketone varies with the conditions and catalysts. 

More recently, the use of benzoyl peroxide catalyst or light (or both) has extended the scope of the reaction. Thus, previously unsuccessful brominations of conjugated diene systems and terminal methyl groups can now be accomplished. ... 

The miscible monomers, ethenylbenzene (styrene) and diethenylben-zene (divinylbenzene, DVB), undergo a free radical induced copolymerization reaction initiated by a benzoyl peroxide catalyst. The exothermic reaction is carried out in an aqueous suspension whereby the mixed monomers are immiscibly dispersed as spherical droplets throughout the reacting medium resulting in discreet beads of copolymer being formed. Correct reaction conditions and the use of suspension stabilizers enable the particle size distribution of the... 

Figure 8 shows 13C NMR spectra of polystyrene prepared with benzoyl peroxide catalyst and measured in chloroform-d at room temperature (a) and in 1,2-dichlorobenzene at 150° C (b). The spectrum measured at room temperature was assigned as shown in the figure on the basis of the results from the oligomer. 

Backbone methylene carbons, poly(1-hexene), 141 Benzoyl peroxide catalyst, 13C NMR of PS, 190... 

Abcure S-40-25. [Abco Industries] Benzoyl peroxide catalyst for unsat polyester resins. 

Abcure, Benzoyl peroxide catalyst, ABCO Industries... 

The curing process was analyzed by means of a rheometry test. The rheograms of ethylene-propylene-diene composites show that the maximum for a sample of sul-fonated ethylene-propylene-norbomene was three times higher than that for virgin ethylene-propylene-norbomene terpolymer. This result suggests that the incorporation of sulfonate groups onto the carbon nanotube surface reduces the cross-limiting efficiency of the benzoyl peroxide catalyst used in the preparation. 

Treat the fibers overnight in a 1% solution of benzoyl peroxide catalyst, in freshly distilled isoprene. 

Superox 46744 colored veining mix (Reichold) Benzoyl peroxide, catalyst... 

---