Zobrazeno 1 - 10
of 13
pro vyhledávání: '"N. N. Lezhnev"'
Publikováno v:
Rubber Chemistry and Technology. 36:541-546
It is shown that the catalytic activity of variable valency metal ions, Cu++ and Fe+++, with respect to the oxidation of polymeric unsaturated hydrocarbons (natural and styrene-butadiene rubbers) can be completely suppressed by introducing into the p
Publikováno v:
Rubber Chemistry and Technology. 24:853-856
In the vulcanization of rubber and in the service performance of vulcanized rubber products, oxygen and free sulfur are always present. Consequently it is important to know the effect of sulfur on the oxidation of rubber. The present work is devoted
Publikováno v:
Rubber Chemistry and Technology. 28:429-437
1. This is the first study of the relation of uninhibited oxidation to the conditions of mechanical stress of vulcanized and unvulcanized rubber. Inhibited oxidation is confined to the initiation process. 2. At the end of the inhibition period and in
Publikováno v:
Rubber Chemistry and Technology. 24:250-253
In the practical application of rubber products, their fatigue characteristics, i.e., the rate of deterioration under repeated mechanical deformation, are frequently of wide importance. Work by several authors has established the fact that the fatigu
Publikováno v:
Rubber Chemistry and Technology. 25:230-233
We know now that the oxidation of rubbers takes place in the absence as well as the presence of antioxidants. However, the mechanism and the rate of the free and inhibited processes are altogether different. In the presence of a sufficient quantity o
Autor:
A. S. Kuzminskii, N. N. Lezhnev
Publikováno v:
Rubber Chemistry and Technology. 26:352-355
Most rubber mixtures contain, besides antioxidants, sulfur and vulcanization accelerators, and these latter have a substantial influence on the oxidation process. Consequently a study of the action of these substances when present simultaneously with
Publikováno v:
Rubber Chemistry and Technology. 44:1282-1286
Carbon blacks age more in air than in a vacuum, and mostly within the first three months of exposure. During the aging process, certain changes occur in the adsorption characteristics of the blacks, such changes being brought about by oxidation, and
Autor:
N. N. Lezhnev, A. S. Kuzminskii
Publikováno v:
Rubber Chemistry and Technology. 28:412-419
1. The oxidation of elastomers in the presence of true inhibitors, of which secondary aromatic amines are an important class, is for practical purposes an initiation reaction and primary oxidation of the chains is possible only to a slight degree. 2.
Autor:
N. N. Lezhnev, A. S. Kuz'minskii
Publikováno v:
Rubber Chemistry and Technology. 24:95-98
It has not yet been ascertained what constituent parts within the structure of various elastomers have the greatest influence on the reactivity of the elastomers. There are indications that the side chains, the presence of methyl groups acting as sub
Autor:
N. N. Lezhnev, A. S. Kuzminskiĭ
Publikováno v:
Rubber Chemistry and Technology. 29:126-130