oxidation of vulcanized rubber, journal of applied polymer
Oxidation of vulcanized rubber, Journal of Applied Polymer
Oxidation of vulcanized rubber For oxidation at 140°, the efficiency was estimated t o be approximately 0 1 moles scissions per .1 mole oxygen, using an indirect calibration through measurement of volatile product yield.
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Inhibited oxidation of vulcanized natural rubber, Journal
Inhibited oxidation of vulcanized natural rubber Inhibited oxidation of vulcanized natural rubber Bevilacqua, E. M. 1966-11-01 00:00:00 Rates of oxidation in oxygen at 140°C. of natural rubber gum vulcanizates containing PBNA as inhibitor have been compared. They are a function of sulfur combined with the rubber, and only slightly affected by curing system for sulfur alone, TMTD sulfurless, and very high‐efficiency sulfenamide plus dithiocarbamate‐accelerated compositions.
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Oxidation of rubber vulcanized with a ... - DeepDyve
Oxidation of rubber vulcanized with a sulfenamide accelerator No significant difference was found. It is concluded that the chain scission mechanism is independent of the nature of the crosslinking.
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Crack initiation of natural rubber under high temperature
Abstract Vulcanized natural rubber ... Journal of Applied Polymer Science. Volume 124, Issue 5 ... Vulcanized natural rubber (NR) under quiescent thermal oxidation aging and high temperature fatigue loading with small strain amplitude was investigated by the infrared spectroscopy, scanning electron microscopy, and positron annihilation lifetime ...
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Infrared analysis of isomerized, vulcanized and oxidized
At least three types of oxidation reactions can be distinguished spectroscopically: (1) degradation of the rubber (by oxidation of a rubber solution with air) with the ultimate formation of only volatile oxidation products; (2) gradual formation of oxygenated derivatives (oxidation with ozone), with a distinguishable structure in the spectrum; (3) gradual formation of an oxidized and more saturated rubber (oxidation of solid rubber with air), with less characteristic broad absorption bands.
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Chemical Reactions of Antioxidants Used in Vulcanized Rubber
Starting from the deduction that the chemical reaction products of the antioxidants accumulate on the surface of the vulcanized rubber due to decreasing solubility, pure gum stocks of cured natural rubber containing diphenylamine, N-phenyl-1- and 2-naphthylamine have been exposed to atmospheric conditions for 8 months.
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Oxidative damage and recovery of silicone rubber surfaces
Zheng Wang, Chongshan Yin, Yi Luo, Long Chen, Yuming Zhou, Chunqing He, Pengfei Fang, Xiangyang Peng and Zhen Huang, Effect of aluminum hydroxide on low‐molecular‐weight siloxane distribution and microstructure of high‐temperature vulcanized silicone rubber, Journal of Applied Polymer Science, 135, 6, (2017).
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Chain scission efficiency in the oxidation of natural
Abstract. The efficiency of the oxidative chain scission in natural rubber vulcanizates has been measured for a simple MBTS vulcanizate with and without antioxidants. This was accomplished by making concurrent measurements of the chain scission velocity and oxidation rate. The chain scission velocity was obtained from stress relaxation measurements...
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Thiuram vulcanization of natural rubber in the presence
Golubchikov, Surfactant-modified polypropylene as a catalyst for oxidation of mercaptans, Russian Journal of General Chemistry, 86, 9, (2203), (2016). Crossref T.G. Vladkova and M.G. Pankova , A Study of the Interactions between Oligoamidephosphate and Curatives in a Sulfenamide-Accelerated Sulfur Vulcanizing System II , Journal of Polymer Engineering , 21 , 6 , (2001) .
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Vulcanization of butyl rubber by p ‐quinone ... - DeepDyve
The vulcanization of butyl rubber by p‐quinone dioxime oxidized by red lead and tetrachloroquinone was investigated. The maximum physical effective crosslinking density of the vulcanizates appeared to be when p‐quinone dioxime and the oxidizing agent were equimolar.
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Oxidation of vulcanized rubber, Journal of Applied Polymer
Oxidation of vulcanized rubber For oxidation at 140°, the efficiency was estimated t o be approximately 0 1 moles scissions per .1 mole oxygen, using an indirect calibration through measurement of volatile product yield.
Send Inquiry
Inhibited oxidation of vulcanized natural rubber, Journal
Inhibited oxidation of vulcanized natural rubber Inhibited oxidation of vulcanized natural rubber Bevilacqua, E. M. 1966-11-01 00:00:00 Rates of oxidation in oxygen at 140°C. of natural rubber gum vulcanizates containing PBNA as inhibitor have been compared. They are a function of sulfur combined with the rubber, and only slightly affected by curing system for sulfur alone, TMTD sulfurless, and very high‐efficiency sulfenamide plus dithiocarbamate‐accelerated compositions.
Send Inquiry
Oxidation of rubber vulcanized with a - DeepDyve
Oxidation of rubber vulcanized with a sulfenamide accelerator No significant difference was found. It is concluded that the chain scission mechanism is independent of the nature of the crosslinking.
Send Inquiry
Crack initiation of natural rubber under high temperature
Abstract Vulcanized natural rubber Journal of Applied Polymer Science. Volume 124, Issue 5 Vulcanized natural rubber (NR) under quiescent thermal oxidation aging and high temperature fatigue loading with small strain amplitude was investigated by the infrared spectroscopy, scanning electron microscopy, and positron annihilation lifetime
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Mechanisms of oxidative degradation. I. Oxidation
The oxidative stability of rubbers depends on the structure of the rubber and the impurities contaminating the rubber. It is known that the oxidation of natural rubber is accelerated by the presence of metallic impurities.
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Chemical Reactions of Antioxidants Used in Vulcanized Rubber
Starting from the deduction that the chemical reaction products of the antioxidants accumulate on the surface of the vulcanized rubber due to decreasing solubility, pure gum stocks of cured natural rubber containing diphenylamine, N-phenyl-1- and 2-naphthylamine have been exposed to atmospheric conditions for 8 months.
Send Inquiry
Infrared analysis of isomerized, vulcanized and oxidized
At least three types of oxidation reactions can be distinguished spectroscopically: (1) degradation of the rubber (by oxidation of a rubber solution with air) with the ultimate formation of only volatile oxidation products; (2) gradual formation of oxygenated derivatives (oxidation with ozone), with a distinguishable structure in the spectrum; (3) gradual formation of an oxidized and more saturated rubber (oxidation of solid rubber with air), with less characteristic broad absorption bands.
Send Inquiry
Oxidative damage and recovery of silicone rubber surfaces
Zheng Wang, Chongshan Yin, Yi Luo, Long Chen, Yuming Zhou, Chunqing He, Pengfei Fang, Xiangyang Peng and Zhen Huang, Effect of aluminum hydroxide on low‐molecular‐weight siloxane distribution and microstructure of high‐temperature vulcanized silicone rubber, Journal of Applied Polymer Science, 135, 6, (2017).
Send Inquiry