Inhibition effect of phenothiazine on the oxidation of natural rubber
of phenothiazine and some other thioamine inhibitors for suppressing the oxidation of rubber and its vulcanizates. This study is aimed at the investigation of the inhibition effect of phenothiazine on the oxidation of natural rubber freed of natural antioxidants and involves its compa
Mechanism of the Action of Inhibitors of the Oxidation of Elastomers
Based on a theory of chain reactions, Semenov concluded that the oxidation of rubber involves a chain degradation process, and he showed that the inhibitor, phenyl-β-naphthylamine, breaks the oxidation chains, reacting with the peroxidic radicals which are formed in the rubber molecules during oxidation. The inhibitor is consumed by union with
Mechanisms of antioxidant action: Sulphur compounds as inhibitors
Polymer Degradation and Stability 4 (1982) 333 34l MECHANISMS OF ANTIOXIDANT ACTION: SULPHUR COMPOUNDS AS INHIBITORS OF MECHANOCHEMICAL DEGRADATION OF RUBBER M. S. S. COKER, G. SCOTT ~; H. A. A. SWEIS Department of Chemistry, University of Aston in Birmingham, Gosta Green, Birmingham B4 7ET, Great Britain (Received: 4 February, 1982) ABSTRACT It is shown that the stability of sulphur
levels this antioxidant does not create a "bloom" on the stock and has no deleterious effect on the rate of cure or on physical properties. It has copper inhibition properties and is used in natural rubber for this purpose. In plastics, the physical properties of Antioxidant 235 make it an outstanding oxidation inhibitor for many high
Aging and Oxidation of Elastomers | Rubber Chemistry and Technology
Natural rubber and synthetic elastomers deteriorate on aging as a result of the contribution of a number of factors. It has been generally recognized for many years that the changes in properties on aging are due primarily to the deteriorating effects of one or more of the following factors: heat, light, oxygen, and ozone.
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maximum usage level for a single antioxidant or antiozonant in a rubber compound. Beyond this, the rubber compound will become “saturated” with the antidegradant and the excess chemical will “bloom” to the surface. This is when synergy between antidegradants can help. If using three (3) phr of antioxidant “A” does not provide the
Antioxidant - an overview | ScienceDirect Topics
Antioxidant peptides obtained from lactic acid bacteria are well established. Microbes act on plant origin substrates or food materials and produce peptides with functional properties. Antioxidant peptides isolated from a traditional Chinese salt-fermented soybean food (douchi) has been investigated in in vitro and in vivo conditions .
Antioxidants & Antidegradants
• UV-light promotes free radical oxidation of the rubber surface which results in the formation of a film of oxidized rubber on the surface of the product (called as Frosting) . • Heat & Humidity accelerate this process. • Light colored rubber products are more prone to UV-light attack than the black colored products (as
98-29-3 - 4-tert-Butylcatechol, 98% - TBC - A14599 - Alfa Aesar
4-tert-Butylcatechol is widely utilized as an inhibitor in polymerization of butadiene, styrene, vinyl acetate and other reactive monomers. It plays an important role in the synthesis of tungsten oxide nanoparticles by nonaqueous sol-gel process. It acts as a stabilizer in the manufacturing of polyurethane foam.