scholarly journals Studies on Organic Peroxides. V. Decomposition of Benzoyl Peroxide by Iron(II)

1960 ◽  
Vol 33 (6) ◽  
pp. 775-779 ◽  
Author(s):  
Shigeo Hasegawa ◽  
Norio Nishimura
Keyword(s):  
Benzoyl Peroxide ◽  
Organic Peroxides

Vulcanization of Rubber. By Organic Peroxides or by Ammonium Persulphate

1930 ◽  
Vol 3 (2) ◽  
pp. 195-200 ◽  
Author(s):  
Iwan Ostromislensky
Keyword(s):  
Benzoyl Peroxide ◽  
Organic Peroxides ◽  
Ammonium Persulphate ◽  
Aluminium Powder ◽  
Metallic Oxides ◽  
Vulcanized Rubber ◽  
Viscous Mass ◽  
Metallic Aluminium ◽  
Short Time ◽  
Rubber Product

Abstract 1. Organic peroxides vulcanize rubber not only in the absence of sulphur but likewise without any foreign substances such as metallic oxides or accelerators of any kind. 2. Rubber vulcanized by means of an adequate amount of benzoyl peroxide (10 to 30 per cent.) gives a soft rubber product which does not differ in point of physical properties from products cured with sulphur, or rather with sulphur chloride. 3. The process of vulcanizing rubber with benzoyl Superoxide is completed in a relatively short time even at a fairly low temperature, sometimes even in two minutes at 119° C., corresponding to 13 pounds pressure. 4. Vulcanization of rubber by means of peroxides may lead to the formation of a soft, transparent and elastic product, which is almost entirely colorless. 5. The products in question vulcanized by means of various peroxides are gradually converted to a very sticky and viscous mass. 6. Sulphur protects the vulcanizates in question from such decomposition or oxidation. However, the products obtained in vulcanization of rubber with organic peroxides in the presence of sulphur are opaque. 7. As distinguished from sulphur, selenium, tellurium, their sulphides, metal oxides (in particular, lead oxide) as well as amines (aniline), tannic acid, and metallic aluminium powder not only do not protect the peroxide vulcanized rubber products from decomposition or oxidation but, on the contrary, they accelerate such processes quite considerably. 8. Benzoyl peroxide is the active vulcanizing agent in the process of heating rubber with a mixture of sulphur and benzoyl peroxide. 9. When rubber is subjected to the action of a mixture of some nitrobenzenes and benzoyl peroxides, vulcanization is effected exclusively by the nitrobenzenes, and the benzoyl peroxide remains altogether passive. 10. Ammonium persulphate vulcanizes rubber completely, resulting in a porous product which, generally speaking, is of small practical value.

High chemiluminescence activity of an FeIII–TAML activator in aqueous–organic media and its use in the determination of organic peroxides

The Analyst ◽  
2015 ◽  
Vol 140 (9) ◽  
pp. 2964-2968 ◽  
Author(s):  
Alexandra S. Demiyanova ◽  
Ivan Yu. Sakharov
Keyword(s):  
Benzoyl Peroxide ◽  
Organic Solvents ◽  
Organic Media ◽  
Organic Peroxides ◽  
Peroxidase Mimic ◽  
Butyl Hydroperoxide ◽  
Highly Active

Using FeIII–TAML, highly active peroxidase mimic, the sensitive chemiluminescence assays for the determination of benzoyl peroxide and tert-butyl hydroperoxide in the presence of organic solvents were developed.

Properties of turpentine relative to the effects on fowl plasma in vitro. II. The separation of peroxide components of turpentine by thin-layer chromatography

1968 ◽  
Vol 46 (5) ◽  
pp. 509-510
Author(s):  
C. le Q. Darcel
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Benzoyl Peroxide ◽  
Styrene Oxide ◽  
Cumene Hydroperoxide ◽  
Organic Peroxides ◽  
Experimental Pathology ◽  
Layer Chromatography

Thin-layer chromatograms were made of some turpentines, organic peroxides, and epoxides, and sprayed to detect peroxides. Benzoyl peroxide, cumene hydroperoxide, and painters' turpentine gave the most prominent spots. Only one of the three epoxides tested, styrene oxide, showed peroxide. Many more peroxides were present in "aged" turpentine than in freshly prepared samples. As aged turpentine has most effect on fowl plasma α-lipoprotein, chemical differences between samples should be considered when turpentines are used in experimental pathology.

scholarly journals Studies of Organic Peroxides. X. The Reaction of Benzoyl Peroxide with Secondary Amines

1967 ◽  
Vol 40 (9) ◽  
pp. 2004-2008 ◽  
Author(s):  
Setsuo Kashino ◽  
Yutaka Mugino ◽  
Shigeo Hasegawa
Keyword(s):  
Benzoyl Peroxide ◽  
Secondary Amines ◽  
Organic Peroxides

ORGANIC PEROXIDES: VII. OXIDATION OF PHENYLHYDRAZONES WITH BENZOYL PEROXIDE

1963 ◽  
Vol 41 (6) ◽  
pp. 1638-1641 ◽  
Author(s):  
J. T. Edward ◽  
S. A. Samad
Keyword(s):  
Benzoyl Peroxide ◽  
Organic Peroxides

not available

scholarly journals Studies of Organic Peroxides. VIII. The Reaction of Benzoyl Peroxide with 5, 5′-Indigo-disulfonic Acid

1967 ◽  
Vol 40 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Setsuo Kashino ◽  
Norio Nishimura ◽  
Kohei Ino ◽  
Shigeo Hasegawa
Keyword(s):  
Benzoyl Peroxide ◽  
Disulfonic Acid ◽  
Organic Peroxides

POLAROGRAPHIC DETERMINATION OF BENZOYL PEROXIDE AND CUMENE HYDROPEROXIDE

1951 ◽  
Vol 29 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Paul A. Giguère ◽  
D. Lamontagne
Keyword(s):  
Dissolved Oxygen ◽  
Benzoyl Peroxide ◽  
Mercury Electrode ◽  
Cumene Hydroperoxide ◽  
Polarographic Determination ◽  
Polarographic Method ◽  
Organic Peroxides ◽  
Half Wave ◽  
Dropping Mercury Electrode

Benzoyl peroxide and cumene hydroperoxide (CHP) are reduced at the anodically polarized dropping mercury electrode, the former at about +0.3 volt vs. S.C.E., and the latter at +0.1 v. Their half-wave potentials as well as that of the two reduction steps of dissolved oxygen are gradually shifted towards more negative values with increasing concentration of organic peroxides. The polarographic method is suitable for determining these peroxides in concentrations up to 2 × 10−3 mole per liter. Dissolved oxygen does not interfere seriously with the analyses.

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